Amino Acid As One Of Whey Protein Reviews ~ Amino acids are usually categorized by their role as important or not important nutrients. Essential amino acids that are not manufactured in the body and therefore must be obtained from food sources. nonessential amino acids can be produced directly by the body or obtained by conversion from other amino acids. Several nonessential amino acids are considered conditionally essential, which means that the stress in certain conditions, such as injury, disease, improve, or intense physical activity, metabolic machinery could not produce adequate levels, and sources of additional food required. A growing body of evidence indicates that specific amino acid mixture based on essential amino acid or semiessential can be very helpful to promote recovery postexercise.
Whey is one of the two proteins found in milk (the other is casein). Whey protein only contributes about 20% of the total proteins found in milk, while casein makes up about 80% of milk protein. Long considered a useless byproduct of the dairy (cheese) manufacturing, whey protein is enjoying an increasing interest as a protein supplement.
It is important to note that commercial products vary widely in their content and other immunoglobulin fraction of immune-active proteins, and many differences between products that are related to different manufacturing processes. Whey protein also contains the estimated 20-30% of the amino acid content as the BCAAs (leucine, isoleucine, and valine), which can be easily oxidized by the muscles as energy and can be associated with a delay in fatigue during exercise for long, especially in the heat.
It is important to note that commercial whey proteins can differ dramatically depending on the processing method and total protein content. For example, whey protein can exist as simple whey powder (30% or less protein content), whey protein concentrate (30-85% protein content) or whey protein isolates (90% or higher protein content). Whey protein is processed by using ion exchange methodology appears to retain most of the functional benefits associated with the maintenance of the immune system.
Increased resistance to infection and 25-44% improvement in levels of glutathione (an antioxidant enzyme that contains cysteine) has been noted in HIV-positive subjects consumed whey protein concentrate (Micke et al., 2001). Whey protein also contains lactoferrin, a protein that has been shown to have bacteriostatic and bactericidal activity against microorganisms that can cause gastroenteric infections and food poisoning. Whey protein has been used in a number of animal and human studies have shown eating in promoting the benefits of weight loss, increased levels of glutathione, and prevent metabolic acidosis (although this effect can be recognized for almost all high-quality protein source).
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