Sunday, December 11, 2011

Help! My fish oil has gone bad! by Jerry Brainum

Omega-3 fatty acids, as found preformed in fatty fish and fish oil, provide a variety of health benefits. The primary benefits are related to cardiovascular health. Fish oil lowers elevated blood triglyceride (fat) levels, which is a risk factor for cardiovascular disease (CVD). Fish oil also seems to help control blood pressure, another CVD risk factor when elevated.Based on countess studies published over the last few years, the recommendation is to consume at least two fatty fish meals per week (such as mackerel,herring, sardines, and others), or ingest fish oil supplements if you refuse to eat fish.
    But there is a problem with fish oil supplements. Fish oil is a high polyunsaturated fat source. What this means is that it is prone to oxidation and rancidity. Oxidized fats have been shown to directly damage blood vessel linings, leading to accelerated atherosclerosis and subsequent CVD. Several studies that have tested commercial fish oil supplements have found that the supplements did contain oxidized fats. Since fish oil is prone to oxidation, does this mean that consuming fish oil may do more damage than good?
    Not according to a new study. The study consisted of healthy subjects with an age range of 18 to 50, who were divided into three groups. The first group ingested 8 grams of day of fish oil, which was consumed with two meals. The second group ingested 8 grams a day of oxidized fish oil capsules. The third group ingested 8 grams a day of high-oleic safflower oil, an omega-6 fat. Fasting blood samples were collected at the start of the study, and at weeks 3 and 7, with the study lasting 7 weeks.To determine the effects of oxidation, several tests that measure oxidative by-products were administered, as well as tests of the endogenous anti-oxidant system in the body (glutathione) and vitamin E levels to see if any changes occurred in the oxidative defense system of the body.
     The results after 7 weeks (and also at the 3-week mark) showed that both the fresh and oxidized fish oil were equally effective at increasing blood levels of omega-3 fatty acids. But no markers of oxidative stress were affected, nor was any indication of lipid peroxidation affected, or inflammation markers. In short, ingesting the oxidized fish oil had no bad effects. How can this be? The gastrointestinal tract acts as a barrier against the uptake of oxidized lipids into the blood. It this manner, it filters the potentially dangerous oxidized fats out of the fish oil. Although there is no evidence that is what happened in this study, this explanation is plausible, and would explain the lack of any side effects after ingesting oxidized fish oil for 7 weeks.
     So next time you read how "cheap" fish oil supplements contain oxidized fat and can harm your health, so you should instead purchase that $85 bottle of fresh "pharmacological grade" fish oil, just turn the page and save yourself some money.

Ottestad, I ,et al. Oxidized fish oil does not influence established markers of oxidative stress in healthy human subjects: a randomized controlled trial.Br J Nut 2011: in press.


©,2013 Jerry Brainum. Any reprinting in any type of media, including electronic and foreign is expressly prohibited.
 


Have you been ripped off  by supplement makers whose products don’t work as advertised? Want to know the truth about them? Check out Jerry Brainum's book Natural Anabolics, available at JerryBrainum.com.

 

The Applied Ergogenics blog is a collection of articles written and published by Jerry Brainum over the past 20 years. These articles have appeared in Muscle and Fitness, Ironman, and other magazines. Many of the posts on the blog are original articles, having appeared here for the first time. For Jerry’s most recent articles, which are far more in depth than anything that appears on this blog site, please subscribe to his Applied Metabolics Newsletter, at www.appliedmetabolics.com. This newsletter, which is more correctly referred to as a monthly e-book, since its average length is 35 to 40 pages, contains the latest findings about nutrition, exercise science, fat-loss, anti-aging, ergogenic aids, food supplements, and other topics. For 33 cents a day you get the benefit of Jerry’s 53 years of writing and intense study of all matters pertaining to fitness,health, bodybuilding, and disease prevention.

 

See Jerry's book at  http://www.jerrybrainum.com

 

Want more evidence-based information on exercise science, nutrition and food supplements, ergogenic aids, and anti-aging research? Check out Applied Metabolics Newsletter at www.appliedmetabolics.com

 



Friday, December 9, 2011

Does beta-alanine work for older people? by Jerry Brainum

Beta-alanine (BA) is a precursor for the synthesis of carnosine in muscle.In muscle, carnosine acts to blunt the fatigue induced by high intensity exercise by buffering against acid build-up in muscle. Previous studies show that by supplementing with BA, younger subjects could increase their muscle carnosine levels by 64%, While exercise alone is known to boost muscle carnosine levels, various studies show that ingesting BA increases muscle carnosine levels more then just exercise alone does. The usual suggested dose for BA is 3.2 to 6.4 grams a day in divided doses. The only side effect thus far known to occur is a tingling feeling similar to a niacin-style flush. This can be avoided by either ingesting smaller doses (800 milligrams or less) or using a time-released BA, which releases BA in a more gradual fashion.
    While BA works well for younger subjects, it's effects in an older population until recently wasn't known. But a new study did test the effects of BA in subjects with an age range of 60 to 80. The subjects consisted of 10 women and 4 men, all of whom ingested either 3.2 grams of BA daily, or a placebo for 12 weeks. The BA was taken as two, 800 milligram tablets in a time-released form twice a day. Others received a placebo. The results after 12 weeks showed that those in the BA group showed an 85.4% increase of carnosine in the gastrocnemius muscle, compared to only 7.2% increase in the placebo group. More importantly, those who ingested the genuine BA showed significant improvements in several performance tests. In one test that looked at time to exhaustion, the BA group showed a 36.5% gain over baseline compared to the 8.6% gain showed in the placebo group. Other tests showed similar improvements in the BA group that were all significantly greater compared to those in the placebo group.
    Based on these findings, it's clear that BA is an effective supplement for older people. In fact, based on the findings of this study, BA appears to work better in older people than it does in those who are younger.This isn't surprising, since carnosine levels in the body decline with age. Not only that, but the higher carnosine levels produced by the BA supplementation could also provide anti-aging effects through inhibiting a process known as glycation, where protein tissues react with sugar. This process is a prime suspect in the stiffness and lack of mobility associated with aging. Thus, BA may not only boost exercise performance in older people, but may also provide some significant anti-aging effects.

del Favero, S, et al. Beta-alanine(Carnosyn) supplementation in elderly subjects (60-80 years): effects on muscle carnosine content and physical capacity.Amino acids;2011: in press.

©,2011 Jerry Brainum.Any reprinting in any type of media, including electronic and foreign is expressly prohibited.


See Jerry's book at     http://www.jerrybrainum.com

                                                         Carnosine structure



Have you been ripped off  by supplement makers whose products don’t work as advertised? Want to know the truth about them? Check out Jerry Brainum's book Natural Anabolics, available at JerryBrainum.com.

 

The Applied Ergogenics blog is a collection of articles written and published by Jerry Brainum over the past 20 years. These articles have appeared in Muscle and Fitness, Ironman, and other magazines. Many of the posts on the blog are original articles, having appeared here for the first time. For Jerry’s most recent articles, which are far more in depth than anything that appears on this blog site, please subscribe to his Applied Metabolics Newsletter, at www.appliedmetabolics.com. This newsletter, which is more correctly referred to as a monthly e-book, since its average length is 35 to 40 pages, contains the latest findings about nutrition, exercise science, fat-loss, anti-aging, ergogenic aids, food supplements, and other topics. For 33 cents a day you get the benefit of Jerry’s 53 years of writing and intense study of all matters pertaining to fitness,health, bodybuilding, and disease prevention.

 

See Jerry's book at  http://www.jerrybrainum.com

 

Want more evidence-based information on exercise science, nutrition and food supplements, ergogenic aids, and anti-aging research? Check out Applied Metabolics Newsletter at www.appliedmetabolics.com

 

Thursday, December 8, 2011

Research determines the best training method—or does it? by Jerry Brainum

You may not know it, but some of the most common styles of training have little-known names. For example, the method in which you start light and increase the weight on each set is called the DeLorme technique, after the researcher who first suggested it in 1945. According to the DeLorme principles, you hold your reps to fewer than 30 per set, since he found that with more than 30 reps, a muscle doesn’t get enough resistance to promote growth.

   With the DeLorme technique you generally start with a weight that’s half the amount you can lift for 10 reps. On the second set you increase the weight to 75 percent of maximum for 10, and on the final set you do the maximum amount of weight you can lift for 10 reps. When you’ve achieved that goal, you increase the weight on all sets.

   The idea was that the lighter sets helped prevent excess muscle soreness while promoting proper exercise form. On the other hand, when the DeLorme technique was used by anyone but highly motivated athletes, people got too fatigued after the first two sets to reach 10 reps with a maximum weight on the final set.

   As a result, another technique was developed, known as the Oxford technique. It works in the opposite manner—you start with the heaviest weight for 10 reps and decrease the weight on each subsequent set. The idea was to diminish muscle fatigue while promoting exercise intensity, since you have to complete the full number of reps for each set.

   Most bodybuilders today use either or both of of these weight-training techniques. The DeLorme method is commonly known as pyramiding, and the Oxford technique is known as reverse pyramiding. Is one of them superior for promoting muscular gains? Researchers examined that question in a recent study featuring 50 subjects who used one technique or the other on the leg extension for nine weeks.1 Both techniques produce similar results, with neither clearly superior at promoting muscle increases.

   In practical terms that means it doesn’t make much difference which technique you favor; you’ll likely get the best results from the style that feels the most comfortable to you.

1 Fish, D.E., et al. (2003). Optimal resistance training: comparison of DeLorme and Oxford techniques. Am J Physic Med Rehab. 82:903-909.

©,2011 Jerry Brainum.Any reprinting in any type of media, including electronic and foreign is expressly prohibited.


Have you been ripped off  by supplement makers whose products don’t work as advertised? Want to know the truth about them? Check out Jerry Brainum's book Natural Anabolics, available at JerryBrainum.com.

 

The Applied Ergogenics blog is a collection of articles written and published by Jerry Brainum over the past 20 years. These articles have appeared in Muscle and Fitness, Ironman, and other magazines. Many of the posts on the blog are original articles, having appeared here for the first time. For Jerry’s most recent articles, which are far more in depth than anything that appears on this blog site, please subscribe to his Applied Metabolics Newsletter, at www.appliedmetabolics.com. This newsletter, which is more correctly referred to as a monthly e-book, since its average length is 35 to 40 pages, contains the latest findings about nutrition, exercise science, fat-loss, anti-aging, ergogenic aids, food supplements, and other topics. For 33 cents a day you get the benefit of Jerry’s 53 years of writing and intense study of all matters pertaining to fitness,health, bodybuilding, and disease prevention.

 

See Jerry's book at  http://www.jerrybrainum.com

 

Want more evidence-based information on exercise science, nutrition and food supplements, ergogenic aids, and anti-aging research? Check out Applied Metabolics Newsletter at www.appliedmetabolics.com

 

Saturday, December 3, 2011

Selenium Sabotage : Can too much of a good mineral derail weight loss? by Jerry Brainum

Selenium is a trace mineral and antioxidant that’s a popular supplement, but some studies have found that increasing selenium intake to five times the recommended allowance, which is 55 micrograms, led to a modest weight gain in men. A new study shows that the effect likely stems from selenium’s role in thyroid hormone metabolism.1


   Selenium promotes the activity of enzymes called deiodinases, which convert the relatively inactive T4 thyroid hormone into the five times more active T3 form. In the study men living in a metabolic ward for four months were given foods either naturally high or low in selenium. During the initial 21 days all the subjects got 47 micrograms a day of selenium, or just below the minimum suggested intake of 55 micrograms. After that the men were divided into two groups, with one group getting only 14 micrograms of selenium a day and the others getting a whopping 297 micrograms. That part of the experiment lasted 99 days.

   At the 45-day mark those in the low-selenium group showed a 14 percent increase in T3, while those in the high-selenium group experienced a 23 percent drop. The men in the high-selenium group also showed an increase in thyroid-stimulating hormone (TSH), which is secreted by the pituitary gland in the brain and controls thyroid output. The TSH increased in the high-selenium group because the body was attempting to compensate for the lower T3 levels.

   By the 64th day the men in the high-selenium group began to gain weight, while those in the low-selenium group lost it. The authors suggest that the high-selenium group had a subclinical hypothyroid, or low thyroid, which explained the weight gain. Just the opposite occurred in the men in the low-selenium group, who showed increases in blood fat and loss of bodyfat, pointing to hyperthyroidism, or thyroid-gland overactivity. Despite the rise in thyroid activity, none of the men in the low-selenium group lost any lean tissue, or muscle, which often accompanies an elevated thyroid state.

   One question not answered in the study was why selenium has these effects on thyroid metabolism. It may be that while a certain amount of selenium activates the deiodinase enzymes, past a certain point the mineral may have a paradoxical, inhibiting, effect. Hydrogen peroxidase is required for thyroid hormone synthesis, and it may be that selenium neutralizes the hydrogen peroxide found in the gland as part of glutathione peroxidase, which would interfere with thyroid hormone production. That effect, by the way, is one of the positive features of free radicals, along with helping immune cells kill invading organisms. It’s a type of “smart bomb.”

   Does that mean you should limit selenium intake as a means of promoting thyroid activity? The researchers suggest that eventually the body adjusts to the increased selenium intake and that thyroid hormone levels return to normal. I can attest to that, since I’ve taken at least 500 micrograms of selenium daily for more than a decade yet have never shown any low thyroid lab values.

   Considering the vital role that selenium plays in preventing the onset of the major killers cancer and cardiovascular disease, it would be sheer folly to limit selenium intake as a means of promoting thyroid activity. On the other hand, since taking more than 1,000 micrograms daily over an extended time can prove toxic, leading to such unpleasant effects as garlic breath and loss of nails and hair, it’s prudent to monitor your doses of this trace mineral.

1 Hawkes, W.C., et al. (2003). Dietary selenium intake modulates thyroid hormone and energy metabolism in men. J Nutr. 133:3443-3448.

©,2011 Jerry Brainum.Any reprinting in any type of media, including electronic and foreign is expressly prohibited.


Have you been ripped off  by supplement makers whose products don’t work as advertised? Want to know the truth about them? Check out Jerry Brainum's book Natural Anabolics, available at JerryBrainum.com.

 

The Applied Ergogenics blog is a collection of articles written and published by Jerry Brainum over the past 20 years. These articles have appeared in Muscle and Fitness, Ironman, and other magazines. Many of the posts on the blog are original articles, having appeared here for the first time. For Jerry’s most recent articles, which are far more in depth than anything that appears on this blog site, please subscribe to his Applied Metabolics Newsletter, at www.appliedmetabolics.com. This newsletter, which is more correctly referred to as a monthly e-book, since its average length is 35 to 40 pages, contains the latest findings about nutrition, exercise science, fat-loss, anti-aging, ergogenic aids, food supplements, and other topics. For 33 cents a day you get the benefit of Jerry’s 53 years of writing and intense study of all matters pertaining to fitness,health, bodybuilding, and disease prevention.

 

See Jerry's book at  http://www.jerrybrainum.com

 

Want more evidence-based information on exercise science, nutrition and food supplements, ergogenic aids, and anti-aging research? Check out Applied Metabolics Newsletter at www.appliedmetabolics.com

 

Thursday, December 1, 2011

Nutrition Scientist Anthony Almada Talks Supplementation, Building Muscle and Losing Bodyfat by Jerry Brainum

   In September 1992 Anthony Almada was doing his customary search of the recent medical literature at the University of California, San Francisco, Medical Library when he came across a study that immediately aroused his interest. Almada had studied under legendary scientists and researchers Lester Packer and George Brooks at the University of California, Berkeley, where he’d observed the depletion of ATP and creatine phosphate in working muscle. He was intrigued when he saw that the new study reported on the effects of creatine as an ergogenic aid to athletes. Finding it that day led him to start a revolution in sports nutrition that continues to this day.


   Almada, who holds degrees in physiology and nutritional biochemistry, had been working in the supplement industry since 1975, specializing in product development. In 1989 he identified and introduced vanadyl sulfate to the nutrition industry, and in 1991 he introduced the first “fat-burning” supplement to use the word thermogenic. Almada contacted a former associate named Ed Byrd and discussed the possibility of marketing creatine. The two had previously supplied raw nutrient materials to food supplement companies and tried to offer creatine, at the time a rare and expensive product, to them. All the companies rejected creatine because it was not well known at the time.

   Almada and Byrd started their own company, initially named California Body Club and later Experimental and Applied Sciences, a.k.a. EAS. The first product Almada designed was a creatine compound called Phosphagen.

   In keeping with Almada’s science background, EAS set a standard of proof by sponsoring two studies during the first year of business, made possible by sales of $6 million. Not long after the company was formed, Almada offered to sell Bill Phillips creatine, but Phillips didn’t seem too interested. In June 1994, however, Phillips joined EAS, and the company was moved from California to Phillips’ home state of Colorado in 1995. In April of that year Phillips offered to buy EAS for $1 million, despite the company profits of $40 million. By October, however, Almada no longer wanted to make the weekly trek from California to EAS headquarters in Colorado, so he sold out to Phillips.

   While at EAS, Almada created the “cell volumizer” concept, pioneered the use of taurine in dietary supplements and created the first low-calorie weight gain/lean mass supplement—Phos­phagain. After leaving EAS, he founded a medical food company that produced a product used to offset HIV-induced wasting.

   Almada has been an active researcher in more than 50 published studies, many of which examined the effects of popular dietary supplements. Currently, he is a founding partner in GENr8, which produces a product called Vitargo SG. Clearly he’s qualified to discuss performance and sports nutrition, so let’s get to it.

   JB: One of the reasons you opted to sell EAS to Bill Phillips was your growing disenchantment with the supplement industry. Has that opinion changed over the years?

   AA: I’m an outspoken critic of the industry because most of the major supplement companies have the funds to sponsor research yet don’t. The first question is, Why don’t they support such research? Some companies do sponsor research, but the findings are never made public, often because the studies found no beneficial effects associated with the tested products.

   The current trend is to have studies done by independent sources, where the results can be tightly controlled and not released if the findings aren’t favorable. In contrast, studies done by university labs aren’t subject to such stringent gag orders.

   Another relevant question is, How many companies are owned by people trained in nutrition science? If you look at pharmaceutical companies, many are run by people who hold science doctorates or medical degrees.

   JB: Are medical doctors good sources of information about nutrition?

   AA: Medical doctors are among the worst sources of information relevant to nutrition. The medical-school curriculum offers nutrition as an elective, or voluntary, course, and most med students feel they are already overburdened with the study of traditional medical courses, so few future doctors have even the minimal training in nutrition science.

Registered dietitians are also often considered a good source of nutrition information, but this, too, isn’t true. While RDs are experts at designing diets, their knowledge of supplements is surprisingly minor. In fact, they are indoctrinated during their training to believe that all required nutrients should be obtained solely through food, thus making any supplements superfluous and even dangerous in some instances. You’ll even find that most people in the sports supplement industry who have advanced degrees, such as doctorates, have them in physiology, not nutrition.


JB: What’s your general philosophy in designing nutritional supplements?

   AA: My philosophy is to create products that work and foster persistent consumer confidence, which leads to lasting brand allegiance. That creates a consumer base that is loyal to the particular product, not only because the product is based on science rather than speculation, but also because the product consistently works. Consumers often switch to other products, or search for the next “miracle” product, because past products simply have not produced the promised gains in muscle size, strength or bodyfat loss. It’s comparable to a marriage: If you’re fulfilled and satisfied with your current partner, you have no desire to seek a replacement.

JB: Many sports supplements don’t list specific amounts of contents on their labels, instead listing nonspecific amounts of nutrients as “proprietary formulas.” Is that ethical or, more important, honest?

   AA: Consumers often evaluate products based entirely on the label chemistry. Listing a bunch of exotic-sounding ingredients tends to obscure the fact that many such ingredients have no science behind them. To the unwary customer, though, they look impressive. The Food and Drug Administration permits the labeling of nonspecific amounts of substances that don’t have established dietary value, so the practice is legal.

   The only FDA requirement is to list the ingredients in descending order of content. So the first listed ingredient comprises 99.9 percent of the product, with the remaining ingredients representing about 00.1 percent of the total ingredients.

   The more relevant question is not what’s in the product but what the product will do for me. Another question to consider is, How many products have I purchased over the last decade that I no longer use? If the products matched their advertising claims, users would be getting exceptional results. Are they?

 JB: Can the placebo effect play a role in results obtained from any particular food supplement?

   AA: It can play a role in the popularity of many supplements, but it’s also short-lived, in contrast to a true biological effect, which consistently lasts. Again, how many products are used year after year by most people? People don’t discard products that work. New products are constantly being introduced to replace products that have fallen out of popularity, mainly because they don’t produce consistent results.

JB: Are there any effective fat-burning supplements?

   AA: People don’t buy fat-burning supplements to “burn” fat; they buy them to lose fat. Then the question arises: Who cares if I’m burning fat, if I’m not actually losing fat? It’s analogous to testosterone. Who cares if my testosterone level rises if I don’t get bigger, stronger or both? People tend to get lost in the mechanism rather than the result.

   Unfortunately, most of the present ingredients touted as fat-burners have little or no effect in stimulating fat loss in humans. One current popular weight-loss herb, hoodia, has zero published science to support it. A major problem with botanicals, or plant-based products, is that the contents can vary enormously from batch to batch, even if the herb is supposed to contain the same level of active ingredients in each tablet or capsule. That explains the varying results of studies involving botanicals.

JB: What’s the truth about protein requirements for bodybuilders?

   AA: Again, you have to look at studies that directly examined the fate of dietary protein in an exercising population. Most bodybuilders, aware of the need for a high protein intake, take in some form of protein about every two to three hours. As a result, bodybuilders get a significant amount of protein from food sources alone. The consensus of studies that have examined protein needs for bodybuilders shows that taking in more than 1.5 grams of protein per kilogram of bodyweight leads to no added muscle or strength gains.


   In one study that I was involved in, we compared a popular meal-replacement product with maltodextrin, a carbohydrate source, and found that both supplements produced the same muscle and strength gains in trained football players. People tend to underestimate the amount of protein they are getting from ordinary foods. If you already take in the optimal amount of protein, taking anything above that will not further boost muscle gains. People are indoctrinated to believe that they must eat massive amounts of protein or lose muscle size.

JB: Can too much protein make you fat and damage your kidneys?

   AA: You have to view protein as a source of calories. Current studies show that taking in more than 30 grams of protein at a time produces no added benefits. While protein can take various metabolic routes in the body, the more protein you have above actual requirements, the less protein is used for building muscle. Eating small, frequent protein meals won’t produce any greater muscle gains if you exceed the amount of protein your body can use for muscle protein synthesis.

JB: Are some sources of protein superior to others?

   AA: Some studies show that soy is as good as whey, meat is as good as whey, and so on. I would say that the primary issues regarding protein intake are palatability and convenience. Soy protein is often said to lower testosterone counts. Yet if that’s true, how do you explain the other studies that show equal muscle gains when soy is compared to whey?

JB: What about the studies showing that whey has the highest biological value of any protein source?

   AA: Studies that measured biological values of various protein sources didn’t involve any subjects engaged in resistance training. Again, it’s a matter of what appears on paper compared to what happens in real life.

©,2013 Jerry Brainum. Any reprinting in any type of media, including electronic and foreign is expressly prohibited.
 


Have you been ripped off  by supplement makers whose products don’t work as advertised? Want to know the truth about them? Check out Jerry Brainum's book Natural Anabolics, available at JerryBrainum.com.

 

The Applied Ergogenics blog is a collection of articles written and published by Jerry Brainum over the past 20 years. These articles have appeared in Muscle and Fitness, Ironman, and other magazines. Many of the posts on the blog are original articles, having appeared here for the first time. For Jerry’s most recent articles, which are far more in depth than anything that appears on this blog site, please subscribe to his Applied Metabolics Newsletter, at www.appliedmetabolics.com. This newsletter, which is more correctly referred to as a monthly e-book, since its average length is 35 to 40 pages, contains the latest findings about nutrition, exercise science, fat-loss, anti-aging, ergogenic aids, food supplements, and other topics. For 33 cents a day you get the benefit of Jerry’s 53 years of writing and intense study of all matters pertaining to fitness,health, bodybuilding, and disease prevention.

 

See Jerry's book at  http://www.jerrybrainum.com

 

Want more evidence-based information on exercise science, nutrition and food supplements, ergogenic aids, and anti-aging research? Check out Applied Metabolics Newsletter at www.appliedmetabolics.com