Showing posts with label inflammation. Show all posts
Showing posts with label inflammation. Show all posts

Wednesday, April 8, 2009

Pet Nutrition: Requirements and related diseases Part 4 Pet Food Labels and Product Types

While American Feed Control Officials (AAFCO) and the National Research Council (NRC) cooperate to publish dog and cat nutrient profiles for growth, maintenance, and reproduction, this series goes beyond the percentages suggested by these organizations and explores in more detail why nutrients are required and what happens if they are not supplied in sufficient quantities. In part 1 we discussed water and energy, in part 2 we talked about protein, fats, carbohydrates and fiber and in part 3 we looked at vitamins and minerals. Today we are going to broaden our discussion by talking about various pet food product types available to us and pet food labeling requirements and issues.

Manufacturers of all commercial dog and cat foods are legally required to provide certain information on the label, including name of product, guaranteed analysis, ingredient guarantee, net weight, and name and address of the manufacturer or distributor. The most important nutritional information on the label is the guaranteed analysis, ingredient list, and the statement of nutritional adequacy. In the USA, all pet foods sold must be registered with state feed control officials and must contain approved ingredients generally regarded as safe, unless they are for specialized purposes such as the amelioration or prevention of disease. Such foods are considered to be drugs and must be approved by the FDA.

Guaranteed Analysis:
This part of the label lists the minimal amounts of crude protein and crude fat and the maximal amounts of water and crude fiber on an as-fed (not dry-matter) basis. This analysis does not specify the actual amount of protein, fat, water, and fiber in the product. Instead, it indicates the legal minimums of protein and fat and the legal maximums of water and crude fiber content contained in the product. A laboratory proximate analysis lists the actual nutrient concentrations in the food, and 2 foods that have identical guaranteed analyses may have very different proximate analyses. A guaranteed analysis for protein may list a minimal level of 25%, while the product may (and usually does) contain >25%. A certain variance above or below a minimum or maximum should be expected. Consequently, whenever possible, the manufacturer’s average nutrient profile should be used to evaluate a food. Direct product comparisons made between like (similar water content) products (ie, dry vs dry, or canned vs canned) are generally valid. However, comparisons across different food types should be made on a dry-matter or caloric basis. As a rule of thumb, dry-food analyses can be converted to a dry-matter basis by simply adding 10% to the as-is value because most dry foods contain ~10% water (eg, a dry-food protein content of 25% on an as-fed basis is equal to 27.5% dry-matter basis). Canned food analyses can be converted to a dry-matter basis by simply multiplying by 4 because most canned foods contain ~75% water (ie, a canned food protein content of 6% on an as-fed basis is equal to 24% dry-matter basis).
Ingredient List:
Ingredients are listed in descending order of weight, on an as-fed basis, in the food. Although a food ingredient (eg, chicken) may be listed first, if that ingredient is 75% moisture, it will contribute a much smaller percentage of total nutrients to the food dry matter. In addition, an ingredient such as corn may be listed by individual types, eg, flaked corn, ground corn, screened corn, kibbled corn, etc. In this case, the total corn amount may be a significant amount of the total food dry matter, but when presented as individual types, each type appears lower on the ingredient list. No reference to quality or grade of an ingredient is allowed to be listed; therefore, it is difficult to evaluate a product solely on the basis of the ingredient list. The value of this list is limited to determining the sources of the proteins and carbohydrates for dogs or cats. This kind of information is useful when evaluating animals that are having an adverse reaction to a food, possibly due to an allergy or intolerance to one or more ingredient sources such as beef, poultry, rice, corn, etc.

Product formulations can be either fixed or open. In a fixed formula, combinations of ingredients and nutrient profiles do not change regardless of fluctuating market prices of the ingredients. In an open formula, ingredients, and possibly actual nutrient profiles, change depending on availability and market prices.

Statement of Nutritional Adequacy:
This statement indicates how the food was tested (feeding versus laboratory analysis or formulation) and for which life stage the food is intended. AAFCO recognizes only 4 life stages: growth, maintenance, gestation, and lactation. The term “all life stages” is frequently used on a label and indicates that the product has been either formulated or tested for growth. By default, it is anticipated that such a food would also pass a maintenance protocol because testing a food for growth generally includes gestation and lactation. There are no AAFCO-approved nutrient profiles for geriatric, senior, or weight loss stages.

The statement “complete and balanced” indicates the product contains all nutrients presently known to be required by dogs or cats and that these nutrients are properly balanced to the energy density of the diet. The “complete and balanced” claim must be substantiated by successfully completing AAFCO feeding trials, or the food must contain at least the minimal amount of each nutrient recommended by AAFCO. There are cautions “against the use of these requirements (levels) without demonstration of nutrient availability” because some of the requirements are based on studies in which the nutrients were supplied as purified ingredients and, therefore, are not representative of ingredients used in commercial pet foods. Laboratory analysis does not address the issue of bioavailability. Supplements, snacks, treat products (ie, those intended for intermittent or supplemental feeding), and therapeutic or dietary products (ie, those intended for use under the direction of a veterinarian) are exempted from AAFCO testing.
Commercial dog and cat foods are available in 3 principal forms: canned, dry, and semimoist. The classifications used depend on the processing method and water content more than on the ingredient content or nutrient profile. Complete and balanced commercial dog and cat diets are formulated to provide adequate quantities of each required nutrient without an intolerable excess of any nutrient. Supplementation of particular nutrients to commercially produced complete and balanced dog and cat foods should be done carefully and only with appropriate justification. Dog foods are not satisfactory for cats because most dog foods are lower in protein, often do not contain assured concentrations of taurine, and are not designed to produce a urinary pH of <6.5 (which helps prevent the crystallization of struvite or magnesium-ammonium-phosphate in the feline urinary tract.

Dry Food:
This is the most popular category of pet food in the USA and some other countries. Dry foods generally contain ~90% dry matter and 10% water. About 95% of dry dog and cat foods are extruded, ie, they are made by combining and cooking ingredients (grains, meat and meat byproducts, fats, minerals, and vitamins), then forcing the mixture through a die. During cooking and extrusion, a temperature of ~150°C converts the starches into a form more easily digested, destroys toxins and inhibitory substances, and flash sterilizes the product. The food is then enrobed with fat and/or digest (material derived from controlled degradation of animal tissues, eg, chicken digest) during drying to increase palatability. Advantages of dry food include a lower cost than canned or soft-moist food, and refrigeration of unused portions is not needed. Dry food may also provide beneficial massage of the teeth and gums to help decrease periodontal disease.

Canned Food:
Canned dog and cat foods contain 68-78% water and 22-32% dry matter. Many of the same ingredients are used in canned pet foods as in dry-extruded types but usually not at the same levels of inclusion. Given their high moisture content, canned foods typically contain higher amounts of fresh or frozen meat, poultry, or fish products and animal byproducts. Many canned pet foods contain textured proteins derived from grains, such as wheat or soy. These materials function as meat analogs having a physical structure similar to meat and high nutritional quality. The use of meat in combination with some of the textured proteins not only holds costs down but can improve the overall nutritional profile of the final product.
Canned pet food processing begins with blending meat or meat analogs and fat ingredients with water and dry ingredients, such as vitamins and minerals, for proper nutrient content. The mixture is blended and sometimes ground to produce a fine slurry depending on product profile. After cans are filled, they are sealed and retorted (a heat and pressure-cooking process that also sterilizes the contents) assuring destruction of food borne pathogens. Advantages of canned food include a long shelf life in a durable container and high palatability. However, canned food is more expensive than dry food.

Soft-moist Food:
Soft-moist dog and cat foods contain 25-40% water and 60-75% dry matter. They do not require refrigeration and are preserved using humectants—substances that bind water so that it is unavailable for bacteria and mold growth and assure shelf life. They include simple sugars (usually sucrose), sorbitol, propylene glycol, and salts. Reports of an increased risk of Heinz body anemia in cats that consume soft-moist foods preserved with propylene glycol have raised concerns over the use of propylene glycol in cat foods, and it has been removed from the generally recognized as safe list for cat foods. Many soft-moist foods are acidified using phosphoric, malic, or hydrochloric acid to further retard spoilage. Advantages of soft-moist foods include convenience, high energy digestibility, and palatability. However, soft-moist food is more expensive than dry food.

Home-cooked Diets:
Dogs can be successfully maintained on properly formulated home-cooked diets; this is much more difficult in cats. Advantages of home-cooked diets include the use of fresh, high-quality ingredients chosen by the owner. Disadvantages include preparation time, variable quality control and diet consistency, higher cost, and the difficulty in formulating and preparing a nutritionally complete and balanced diet. It is most difficult to formulate a nutritionally complete and balanced diet with sufficient nutrient density in a small volume of food that is palatable for cats. Many home-cooked diets result in foods that are high in protein and caloric density and have inappropriate calcium:phosphorus ratios and inadequate levels of calcium, copper, iodine, fat-soluble vitamins, and several of the B vitamins. Many published recipes for feline diets have very high ash or mineral levels due to the extent of synthetic nutrient supplementation required.
Stay tuned for part 5 disussing feeding practices at the various life stages of an animal.
Notes: Contribution
Merck Veterinarian Manual

Tuesday, March 10, 2009

What’s Really in Pet Food? Part 2 Label basics, standards and regulations

In Part 1 of this series we briefly introduced the subject matter and discussed the major players in the pet food industry. But as we have learned the trend to bigger doesn’t necessarily translate into better and unfortunately we learned, not that it would be anything new, that there are major differences between what pet owners think they are buying and what they are actually getting. This comment focuses in very general terms on the most visible name brands, the pet food labels that are mass-distributed to supermarkets and discount stores. However, just so that we are on the safe side, there are also many highly respected brands that may be guilty of the same offenses. What many pet owners to this day still don’t know is that the pet food industry is an extension of the human food and agriculture industries. Pet food provides a convenient way for slaughterhouse offal, grains considered “unfit for human consumption,” and similar waste products to be turned into profit. In order for the consumer to make an educated decision it is necessary to learn, among many others considerations, how to read pet food labels to begin with.
There are special labeling requirements for pet food, all of which are contained in the annually revised Official Publication of AAFCO.2 While AAFCO does not regulate pet food, it does provide model regulations and standards that are followed by U.S. pet food makers.
The name of the food provides the first indication of the food’s content. The use of the terms “all” or “100%” cannot be used “if the product contains more than one ingredient, not including water sufficient for processing, de-characterizing agents, or trace amounts of preservatives and condiments.”
The “95% Rule” applies when the ingredient(s) derived from animals, poultry, or fish constitutes at least 95% or more of the total weight of the product (or 70% excluding water for processing). Because all-meat diets are not nutritionally balanced and cause severe deficiencies if fed exclusively, they fell out of favor for many years. However, due to rising consumer interest in high quality meat products, several companies are now promoting 95% and 100% canned meats as a supplemental feeding option.
The “dinner” product is defined by the “25% Rule,” which applies when “an ingredient or a combination of ingredients constitutes at least 25% of the weight of the product (excluding water sufficient for processing)”, or at least 10% of the dry matter weight; and a descriptor such as “recipe,” “platter,” “entree,” and “formula.” A combination of ingredients included in the product name is permissible when each ingredient comprises at least 3% of the product weight, excluding water for processing, and the ingredient names appear in descending order by weight.
The “With” rule allows an ingredient name to appear on the label, such as “with real chicken,” as long as each such ingredient constitutes at least 3% of the food by weight, excluding water for processing.
The “flavor” rule allows a food to be designated as a certain flavor as long as the ingredient(s) are sufficient to “impart a distinctive characteristic” to the food. Thus, a “beef flavor” food may contain a small quantity of digest or other extract of tissues from cattle, or even an artificial flavor, without containing any actual beef meat at all.
The ingredient list is the other major key to what’s really in that bag or can. Ingredients must be listed in descending order of weight. The ingredient names are legally defined. For instance, “meat” refers to only cows, pigs, goats and sheep, and only includes specified muscle tissues. Detailed definitions are published in AAFCO’s Official Publication, revised annually, but can also be found in many places online.
The guaranteed analysis provides a very general guide to the composition of the food. Crude protein, fat, and fiber, and total moisture are required to be listed. Some companies also voluntarily list taurine, Omega fatty acids, magnesium, and other items that they deem important, by marketing standards.

Pet Food Standards and Regulations
The National Research Council (NRC) of the Academy of Sciences set the nutritional standards for pet food that were used by the pet food industry until the late 1980s. The original NRC standards were based on purified diets, and required feeding trials for pet foods claimed to be “complete” and “balanced.” The pet food industry found the feeding trials too restrictive and expensive, so AAFCO designed an alternate procedure for claiming the nutritional adequacy of pet food, by testing the food for compliance with “Nutrient Profiles.” AAFCO also created “expert committees” for canine and feline nutrition, which developed separate canine and feline standards.
While feeding trials are sometimes still done, they are expensive and time-consuming. A standard chemical analysis may also be used to make sure that a food meets the profiles. In either case, there will be a statement on the label stating which method was used. However, because of the “family rule” in the AAFCO book, a label can say that feeding tests were done if it is “similar” to a food that was actually tested on live animals. There is no way to distinguish the lead product from its “family members.” The label will also state whether the product is nutritionally adequate (complete and balanced), and what life stage (adult or growth) the food is for. A food that says “all life stages” meets the growth standards and can be fed to all ages.
Chemical analysis, however, does not address the palatability, digestibility, or biological availability of nutrients in pet food. Thus it is unreliable for determining whether a food will provide an animal with sufficient nutrients. To compensate for the limitations of chemical analysis, AAFCO added a “safety factor,” which was to exceed the minimum amount of nutrients required to meet the complete and balanced requirements.
In 2006, new NRC standards were published; but it will take several years for AAFCO’s profiles to be updated and adopted, let alone accepted by the states.
The pet food industry loves to say that it’s more highly regulated than human food, but that’s just not true. Pet food exists in a bit of a regulatory vacuum; laws are on the books, but enforcement is another story. The FDA has nominal authority over pet foods shipped across state lines. But the real “enforcers” are the feed control officials in each state. They are the ones who actually look at the food and, in many instances, run basic tests to make sure the food meets its Guaranteed Analysis, the chart on the label telling how much protein, fat, moisture, and fiber are present. But regulation and enforcement vary tremendously from state to state. Some, like Texas, Minnesota, and Kentucky, run extensive tests and strictly enforce their laws; others, like California, do neither.
Reprinted with permission from and contributed by
Born Free USA united with Animal Protection Institute and reprinted with permission. © 2003-2009 - Born Free USA united with Animal Protection Institute - All rights reserved

Monday, March 2, 2009

Feeding natural alternatives: Fabulous pet food for Cats & Dogs

The following article reflects in large also my opinion about feeding our pets what I consider technically the only really natural food: Raw. Joan Morris wrote in the Contra Costa Times:
“Old Mother Hubbard might have needed some assistance in managing her household budget, but some pet owners and veterinarians approve her choice of pet food. Giving her dog a bone, one with some meat on it along with a side of fresh vegetables is the best thing, they say, she could do for the pup. A growing number of pet owners are canning the Alpo and tossing out the kibble in exchange for natural and raw pet foods, sometimes called designer pet food, that they say provide the healthiest diet possible for our domesticated wild things. They point to the diets dogs and cats ate long before Morris starting pushing kitty chow or Gravy Train rolled into town. Dogs and cats ate what humans ate or what they could catch on their own, and they were the better for it.
"I have so many clients and so many stories," says Alameda veterinarian Kristina Dallas. "You hate to call them miraculous, but they are. And when you start to see so many miracles, you have to question why." Dallas, who works at Alameda Pet Hospital, is a natural food convert. She's seen chronic intestinal illnesses and skin diseases clear up immediately with the food change, while diseases such as diabetes become more manageable. The coats thicken and shine, eyes clear, energy returns. Little wonder, Dallas says. She thinks that feeding animals a steady diet of processed pet food is something akin to humans eating breakfast, lunch and dinner at McDonald's. In fact, she says, that would be healthier than the pet food. "I don't preach natural diets to everyone," Dallas says. "If the animal looks good, then I don't recommend a change. It's also more expensive to go to natural foods, so you have to take that into account. But when there's a problem, that's where we should look."
A tough battle: Designer pet food purveyors tend to be small companies feeling their way through the mine fields of the highly competitive pet food industry. They battle not only the resources of national pet food manufacturers, but the perception, even among veterinarians, that brand-name foods provide the healthiest diets for animals. Veterinarians receive little training in pet nutrition, Dallas says, and like pet owners, rely on reading the labels and trusting what they read. We look for food made with meat and scan those tiny labels in search of the magical "meets 100 percent of nutritional requirements." But not all meat is rendered equally, Dallas says, and it's hard to say how much of those nutritional additives are being utilized by your pet's metabolism. Most pet foods, even premium brands, are made with meat byproducts, which include everything not fit for human consumption. That, Dallas says, would be feathers, feet, tumors and abscesses. It is all carved from the animals and placed in barrels, which are shipped to pet food manufacturers. Processing it removes any dangers to pets, but it doesn't make it particularly good for them, she says.
Natural foods have their critics, too. Many complain the costs are unreasonably high, about twice that of brand names and that evidence of the food's benefits is, at best, anecdotal. Brand-name companies boast that they've tested their food and conducted nutritional studies that show their foods are healthful, while designer food makers are experimenting in the family kitchen. Those who feed natural and raw food diets also sacrifice some of the convenience that traditional pet foods provide. Designer pet foods remains a niche market, but it is growing. … And some large pet food companies are expanding their lines to include the natural labels, and beefing up their advertising to promote ingredients such as New Zealand lamb.”
Allow me to comment on a couple points here: Talking about cost: I have my serious doubts about that. However, to show my thought process on this and documenting it with real, factual and cash numbers requires some more serious effort and also would be too lengthy to talk about it in this comment today. But stay tuned as I will bring you more details on this particular topic within a separate comment to follow soon. So much up front: Get ready for a big surprise.
Now let’s discuss what Morris calls a “designer” food. Her article dates back quite a few years. Reason why I decided to share it with you here is simply that she is talking about some major facts on natural and raw feeding, which I consider worthwhile to be discussed. However, at this point I believe we are far beyond that point of considering healthy food designer food. They have in the meantime become and grown into a substantial, undeniable factor in the pet food industry and definitely are here to stay. Example: Pet Product News International, a monthly news magazine distributed within and published for the pet supply retail industry writes in its March 2009 issue:” Prepare for the unprepared: The raw food demand just might exceed a retailer’s expectations. According to David Lummis, senior pet market analyst for Packaged Facts in Rockville, MD, raw is still only about 1% of the overall pet food market. However, retailers unfamiliar with the uncooked concept may be interested and surprised to learn it is currently experiencing double digit growth. It is growing about 20 to 30 percent annually, Lummis discloses. It is very big, especially compared with the pet food industry overall, which is growing by maybe 5% at best. And a lot of that (5%) is coming from price increases.” Veterinary Practice News in its January 2009 issue addressed veterinarians as follows: “Alternative diets still riding high. Nearly two years after the massive recall of melamine tainted pet food, veterinarians are still fielding pet owners’ questions about alternative diets. “Even prior to the recall we were seeing a shift in pet owners who were interested in alternatives to conventional pet foods, such as natural or organic pet foods, raw pet foods and home cooked diets,” says Sally C. Perea, DVM, Dipl.ACVN. The recall accelerated the trend, Dr. Perea says, as pet owners began to look for what they perceived to be safer dietary options. … Perea was formerly a consultant with Davis Veterinary Medical Consulting, Inc. in Davis, CA and now is a senior nutritionist for Natura Pet Products in San Jose, Ca.” Natura is known for it’s
Innova, Evo, California Natural, HealthWise, Karma and Mother Nature brands. Veterinary Practice News: “Perea considers alternative diets to fall into 3 categories: Alternative commercial pet foods, home cooked pet foods and raw pet foods, either commercial or home prepared.”
Let’s go back to Morris’ writing: “Natural vs. raw: But even within the growing market of designer pet food there are cat fights between the naturals and the raws. Some owners favor natural pet food, which is made from the same meat and produce that might otherwise find its way onto your dining-room table, 100 percent human grade, they call it. Others opt for raw food, saying that while natural is better than brand-name foods, they still are over-processed, robbing them of important nutrients. Opponents of raw food worry that improper handling could poison the pets and maybe their human owners with salmonella and E. Coli. Stephen Barone, co-founder of
Primal Pet Food, says he worries about serving raw meat to pets are exaggerated. People only need to take the same precautions they take in preparation of their own food.
Primal, based in San Francisco, ships frozen raw foods to customers throughout the country, although the Bay Area has been the company's primary market since the company began in 2001. The food also is sold in area stores. Prices vary, depending on type of meat and size… . Barone, 36, and his partner, Matthew R. Koss, 33, started the business after Koss' own pets began suffering from health problems. Koss, a graduate of the San Francisco Culinary Academy, used his own knowledge of nutrition to concoct a raw formula for his dogs, which responded immediately, he says. Koss began talking with animal nutritionists and eventually developed a line that combines raw meats -- beef, lamb, chicken, duck, venison and fresh vegetables. He partnered with Barone, his longtime friend, to market the meals to other pet owners. In the three years since they began, they've expanded their line to include cat food. Koss and Barone named their food plan B.A.R.F., "bones and raw food." They comb the countryside looking for fresh meats and produce, buying from farmers and ranchers who also supply fine restaurants. The products are sold frozen and include the popular "medallion" form, which packages the food in one ounce nuggets, which makes serving and handling easier. Primal's business has grown substantially. Barone and Koss set up tables at dog and cat shows, and club events. Their customers are devoted to the B.A.R.F. diet.
Primal instinct: Ellen Brooken of Walnut Creek started feeding Primal to her two Cavalier King Charles spaniels, Maddie and Paige, about two years ago. One of her dogs had chronic health problems and she was spending $100 to $200 a month at her vet's office. At a dog show, she picked up a sample of Primal and a testimonial from a fellow pet owner. She was skeptical, but she gave it a try. "Within two days, her digestive problems were completely gone," Brooken says. "That was pretty astounding. And we've had no problems since." The clincher, Brooken says, is when she took both dogs in for their annual check-up and her vet commented that it had been a long while since they'd been in. The dogs got perfect marks on their exams, but Brooken could see the improvements for herself. Their coats are glossy and their eyes shiny, she says. Brooken supplements Primal with her own recipes and raw foods. Her vet wasn't totally supportive of the diet plan, Brooken says, so she switched doctors to one who is. The raw food is more expensive, Brooken says, but she considers it a trade-off. "I've never done a side-by-side comparison, but I know I'm not spending hundreds a month on vet bills," Brooken says. "And my dogs are extremely healthy. I'm convinced."”

Saturday, January 31, 2009

Omega-3 and Omega-6 Fatty Acids: Healthy Dietary Building Blocks with Many Health Benefits

Omega- 3 and Omega- 6 fatty acids are important building blocks of a healthy diet. Learn how these essential fatty acids help prevent heart disease, decrease inflammation and strengthen the immune systems of both dogs and cats.
What are omega-3 fatty acids? Omega-3 fatty acids are a form of polyunsaturated fats, one of four basic types of fats that animals and humans derive from food. (Cholesterol, saturated fat, and monounsaturated fat are the others.) All polyunsaturated fats, including omega-3s, are increasingly recognized as being important to good health. Some doctors and scientists believe that consuming too many foods rich in saturated fats attributes to the development of degenerative diseases, including heart disease and even cancer. Polyunsaturated fatty acids, however, are healthy for animals and humans. Omega-3 fatty acids, which are found primarily in cold-water fish, fall into this category, along with omega-6 fatty acids, which are found in grains, most plant-based oils, poultry and eggs.
Omega-3s (and one omega-6) are considered important fatty acids because they are critical for good health. They are essential building blocks your dog and cat needs for a healthy heart and strong immune system.
There are different types of omega-3 fatty acids. Key Omega-3 fatty acids include eicosapentaenoic acid (EPA) and docosahexanoic acid (DHA), both found primarily in oily cold water fish such as salmon, tuna and mackerel. Aside from fresh seaweed, plant foods rarely contain EPA or DHA. A third omega-3, called alpha-linolenic acid (ALA), is found primarily in dark green leafy vegetables, flaxseed oil and certain vegetable oils. ALA is not readily accessible to animals, which must use several enzymatic steps in their metabolism to convert it into a useful configuration like EPA. Thus, scientists estimate that only a small fraction of ALA benefits dogs; and cats totally lack one of the metabolic enzymes to utilize ALA. Some dogs, too are extremely poor in utilizing ALA, especially if high amounts of metabolically "competitive" Omega -6 fatty acids are present. These poor dogs constantly suffer with skin problems unless their food is supplemented with EPA from for example salmon oil.
Omega-3 fatty acids have been shown to improve heart health in dogs, cats and humans. They play a part in keeping cholesterol levels low, stabilizing irregular heart beat (arrhythmia) and reducing blood pressure. Omega-3 fatty acids are also natural blood thinners, reducing the "stickiness" of blood cells (called platelet aggregation), which can lead to such complications as blood clots and stroke. Specifically, two papers reported by the Centers for Disease Control and Prevention, in collaboration with investigators from the University of California at San Francisco have shown levels of omega-3 fatty acids to be inversely correlated with the risk for coronary artery disease (CAD) and stroke. Omega-3 fatty acids have been shown to help a dog or cat avoid arthritis and stiff jointsAs dogs and cats' age, their movement may become labored, their joints may stiffen and they may suffer from arthritis. These signs of inflammation can make them less comfortable and can greatly limit the amount of exercise they get. Scientific studies have shown that Omega-3 fatty acids can help to reduce joint stiffness, swelling, tenderness and overall fatigue. Numerous studies report that participants with inflammatory diseases who ingest omega-3s are more successful in combating arthritis.
"Fatty acids contained in fish such as salmon may prove to function as nature's own anti-depressants," says a study of 30 patients conducted by a research team headed by Andrew Stoll, M.D., director of the pharmacology research laboratory at Harvard University. The university's McLean Hospital found that some of the patients' symptoms of manic depression responded favorably to treatment with fish oil supplements. Toyama Medical and Pharmaceutical University in Toyama, Japan, showed one omega-3 acid, DHA, to prevent an increase in extra aggression during periods of stress.Omega-3 fatty acids, both DHA and EPA, are found in fatty fish, including salmon and cod. They may work by increasing serotonin levels, thus boosting neurotransmitter activity, as do anti-depressants such as Prozac. They may also help by restocking the outer brain cells, which receive chemical signals.
Medical research shows omega fatty acids have health benefits. Scientists made one of the first associations between omega-3 fatty acids and good health while studying the Inuit (Eskimo) people of Greenland in the 1970s. As a group, the Inuit suffered far less from certain diseases (coronary heart disease, rheumatoid arthritis, diabetes mellitus, psoriasis) than their European counterparts. Yet their diet is very high in fat from eating whale, seal, salmon and other fish.Eventually researchers realized that these foods were all rich in omega-3 fatty acids, which provided real disease-countering benefits.
Omega 3s help prevent discomforts related to inflammation. Rheumatoid arthritis, lupus, Raynaud's disease and other autoimmune diseases greatly decrease quality of life. Diets high in omega-3 fatty acids (such as fish oils) have been shown to increase survival in people with autoimmune diseases. This is probably because the omega-3s help the arteries, as well as many other parts of the body stay inflammation free. EPA and DHA are successful at this because they can be converted into natural anti-inflammatory substances called prostaglandins and leukotrienes, compounds that help decrease inflammation and pain. In 1998, an exciting review of well-designed, randomized clinical trials reported that omega-3 fatty acids were more successful than a placebo ("dummy drug") in improving the condition of people with rheumatoid arthritis. The research also showed that getting more omega-3 fatty acids enabled some participants to reduce their use of nonsteroidal anti-inflammatory drugs (NSAIDs).