Whey Protein vs Soy Protein
Difference between Whey Protein and Soy Protein
Whey and soy protein powders are two of the most popular types of protein supplement products on the market. Each is designed to be used as a fitness supplement and/or as a way to treat protein deficiency.
Whey protein is derived from cow's milk. There are three main types of whey protein powders, including concentrate, isolate and hydrolysates. Whey is known as a complete protein that is fast and easy to digest. Composed naturally of the best amino acids, many protein drinks contain this type of protein because of its quick absorption and digestion rate. The quick absorption stimulates a rapid appearance of essential amino acids that can act as a signal to elevate muscle growth and repair, making it a good supplement to consume after an intense workout. The downside to this product is that whey protein, like other dairy products, contains lactose. For vegetarians, vegans and the lactose intolerant, this can eliminate whey as an option for obtaining the protein needed to sustain your body pre and post workout.
Soy protein powder is derived from soybeans, making it ideal for vegetarians or those who are lactose intolerant. This is the primary difference between whey and soy protein supplements. Soy protein contains all nine essential amino acids and high amounts of glutamine and arginine – two important amino acids which aid stamina and muscle recovery. The key benefits of soy are its high protein content, essential fatty acids, phytosterols, and lecithin, fiber components, isoflavones, and protease inhibitors. Very low in fat, soy contains no cholesterol and contains phytochemicals. The small amount of naturally-occurring fats found in whole soybeans include essential oils and fats like Omega 3’s. Soy protein gets absorbed at a more gradual pace than Whey. There are some concerns about the isoflavones found in soy. Studies suggest that isoflavones can disrupt the body's hormonal balance. As a result soy intake is sometimes implicated in thyroid problems and changes in testosterone and estrogen levels. Also, some of the inhibitors found in soy have been known to obstruct digestion.