What is the best protein powders ? Whey and soy are both types of protein, offered in
powder form as sports or nutritional supplements. Protein is essential, especially for bodybuilders and athletes, who make use of these supplements to assist with recuperation from exercise and to promote muscle development. If you are interested in using one of these protein powders, then this article will help you understand the main differences between whey and soy, so you can make the best choice for your needs.
Whey and Soy Sources
Soy proteins are derived from soybeans and come in either isolates (very pure form) or concentrates (less pure form). Whey proteins are extracted from whey, a liquid by-product cheese production.
Minerals and Vitamins
Soy features a significantly higher mineral and vitamin profile than whey. Soy is a decent source of zinc, iron, phosphorus, potassium, B vitamins and vitamin E.
Amino Acids
Whey is considered as the highest standard with regards to protein powders, and this is essentially a result of its well-balanced and high levels of amino-acids — the building bricks of proteins. Whey contains all of the essential amino-acids, making it a ‘complete’ protein source. Soy is a complete protein too, however it isn’t as well-balanced as whey is. In saying that, soy does contain higher levels of arginine and glutamine, two amin-acids that are vital to muscle-building.
Usage
Whey features a considerably greater biological value. Basically, this means that whey proteins are in a form that is easily (and rapidly) digested and absorbed by the body. This makes whey an ideal choice for a post-workout and exercise recovery supplement, making certain that your muscles receive the nutrition they need fast..
Hormonal Effects
Isoflavins, which are antioxidants present in soy, are linked to upset hormonal balances. Soy contains phytoestrogen, a substance that may result in a decrease in testosterone in the body and a boost in estrogen, a female hormone. In serious cases, excessive soy supplementation can lead to hyperthyroidism or male infertility.
Cost
Whey protein powders are more popular and in demand than soy powders, and as a result are generally less expensive due to mass level manufacturing.
