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Home » Q & A » Soy Protein
Question: What is the difference between whey protein and soy protein?
Question Description:
I take soy protein, but after looking at some answers to other questions, you guys are saying whey protein. What are the pros and cons of both, or of other protein shakes out there.
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Answer#1: Whey is a complete protein, meaning it contains all essential amino acids, which are vital to your metabolism, and to making your body function properly for good health. Whey protein, when properly processed has the highest biological value of all proteins.Soy protein isolates are widely used as a nutritional, functional or economic alternative to traditional proteins in food bars, beverages, baked goods, breads, cereals, poultry, red meat and seafood products. The product is nearly carbohydrate and fat-free, with no characteristic ‘beany’ flavour.This protein is considered "complete" because it contains all eight amino acids (protein building blocks) that are essential (cannot be manufactured internally) to maintain healthy cells in the human body."So the difference? Well after reading and comparing-- I see no difference except Soy is also know for helping lower cholesterol.
Answer#2: whey is cheaper and more effective. When milk is used to make cheese the part that isn't used as cheese is whey. Soy is made from soy beans. I would go with whey it is the most absorbable protein by the body period and its alot cheaper.
Answer#3: Whey protein is probably the most popular and makes up about 20% of the protein in milk. When milk is curdled, the whey ends up as a separate liquid. Unfortunately, this whey has a lot of fat, lactose, and cholesterol, but new manufacturing methods take care of them. 12 One way is via ultrafiltration and microfiltration, which use microscopic filters to physically separate the protein from fat and lactose. This results in a protein that's reasonably pure, with small amounts of lactose and fat. You'll usually see this on a nutritional label listed as "whey protein concentrate." The other method is ion exchange, which puts the protein through a static electrical charge that separates the whey from the lactose and fat. You'll usually see this product listed as "whey protein isolate."Soy protein is derived from a plant rather than animal source. It's not of a very high quality, so it was never very popular with athletes. However, a few years back, a company called Protein Technologies developed an advanced method for soy protein extraction and isolation, creating a high-quality vegetable protein. This soy protein isolate, Supro, is the protein found in most soy protein powders.
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