Are protein supplements really better than protein foods?

Speaking of protein absorption rates, the discussion of fast acting versus slow acting proteins seems to be the latest hot topic these days in bodybuilding circles. The interest was sparked by studies in 1997 and 1998 that examined the differences between the absorption rates of whey versus casein. The researchers concluded that whey was a fast acting protein and was considered to be more "anabolic" while casein was slower acting and was considered to be more "anti-catabolic. " It was further hypothesized that consuming a combination of these two types of proteins could lead to greater muscle growth. These findings have prompted the supplement companies to market an entirely new category of protein supplements; casein and whey mixes. The problem with drawing such conclusions so quickly is that these studies looked at the speed of whey and casein absorption in subjects who had fasted for 10 hours before being fed the protein. Any suppositions drawn from this information are probably irrelevant if you are eating mixed whole food meals every three hours. Obviously, more research is needed.

This recent fascination with various rates of protein absorption could be compared to the interest in the glycemic index. The glycemic index is a scale that measures the rate at which the body converts various carbohydrate foods into blood glucose. The higher the glycemic index, the faster the food is converted to glucose and the larger the insulin response. Therefore it is said that high glycemic foods should be avoided in favor of low glycemic index foods. The error in relying solely on the glycemic index as your only criteria for choosing carbohydrates is that the index is based on consuming a carbohydrate food by itself in a fasted state. When carbohydrates are consumed in mixed meals that contain protein and a little fat, the glycemic index loses its significance because the protein and fat slow the absorption of the carbohydrate. That’s why the glycemic index is really much ado about nothing and the same could probably be said for the casein and whey argument. It's just the latest in a long string of new angles that supplement companies use to promote their protein: free-form vs peptides, concentrate vs isolate, ion exchange vs microfiltration, soy vs whey, casein and whey mix vs pure whey and so on. Every year, you can count on some new twist on the protein story to appear. Certainly there are going to be advances in nutrition science, but all too often these "new discoveries" amount to nothing more than marketing hype.

What about amino acid pills? Amino acids pills are simply predigested protein. Proponents of amino acid supplementation claim that because the amino's are predigested, the body will absorb them better, leading to greater improvements in strength and muscle mass. It sounds logical, but this is a gross underestimation of the body's capacities and actually the reverse is true: The human digestive system was designed to efficiently process whole foods; it was not designed to digest pills and powders all day long. Amino's are absorbed more rapidly in the intestine when they are in the more complex di and tri-peptide molecules. Your body gets better use of the aminos as protein foods are broken down and the amino's are absorbed at just the right rate for your body's needs. In "Exercise Physiology; Energy Nutrition and Human Performance," authors Katch and McArdle state that "Amino acid supplementation in any form has not been shown by adequate experimental design and methodology to increase muscle mass or significantly improve muscular strength, power, or endurance."

Furthermore, consuming predigested protein when you are seeking fat loss is not necessarily advantageous because it shortchanges you of the thermic effects of real food. Whole foods have a major advantage over protein supplements; they stimulate the metabolism more. This is known as the "thermic effect of food." Protein has the highest thermic effect of any food. Including a whole protein food with every meal can speed up your metabolic rate as much as 30% because of the energy necessary to digest, process, and absorb it. This means that out of 100 calories of a protein food such as chicken breast, the net amount of calories left over after processing it is 70. In this respect, the fact that protein foods digest slower than amino acid tablets is actually an advantage.

A final argument against amino acid supplements is the cost. Amino's are simply not cost effective. If you don’t believe it, pick up a bottle and do the math yourself. One popular brand of "free form and peptide bonded amino acids" contains 150 1000mg. tablets per bottle and costs $19.95. 1000 mg. of amino acids equals 1 gram of protein, so the entire bottle contains 150 grams of protein. $19.95 divided by 150 grams is 13.3 cents per gram. Let's compare that to chicken breast. I can buy chicken breast from my local supermarket for $2.99 a pound. According to Corinne Netzer’s "Complete Book of Food Counts," there are 8.8 grams of protein in each ounce of chicken, so one pound of chicken (16 oz) has about 140 grams of protein. $2.99 divided by 140 grams equals 2.1 cents per gram. The amino acids cost more than six times what the chicken breast does! I don’t know about you, but I’ll stick with the chicken breast.

The biggest advantage of protein supplements is not that they can build more muscle than chicken or egg whites or any other whole food protein, the biggest advantage is convenience. It is easier to drink a protein shake than it to buy, prepare, cook and eat poultry, fish or egg whites. Consuming small, frequent meals is the optimal way to eat, regardless of whether your goal is fat loss or muscle gain. To keep your body constantly in positive nitrogen balance, you must consume a complete protein every three hours. For many people, eating this often is nearly impossible. That's when a high quality protein supplement is the most helpful.

Aside from convenience, the truth about protein supplements is that they offer few advantages over protein foods. There is no scientific evidence that you can't meet all of your protein needs for muscle growth through food. As long as you eat every three hours and you eat a complete protein such as eggs, lean meat or dairy products with every meal, it is not necessary to consume any protein supplements to get outstanding results. Whey protein does have some interesting and useful properties and supplementing with a couple scoops each day is not a bad idea, especially if you are on a low calorie diet for fat loss. Aside from that, focus on real food and don’t believe the hype.

About The Author

Tom Venuto is a bodybuilder, gym owner, freelance writer, success coach and author of the #1 best-selling e-book "Burn the Fat, Feed The Muscle" (BFFM): Fat Burning Secrets of the World's Best Bodybuilders and Fitness Models. For more information please visit http://www.burnthefat.com