Question:
What is the difference between soy and whey protein?

   — Jan T. (posted on May 1, 2002)

May 1, 2002
Whey protein is a milk product and soy is a plant product. Some people who have problems with milk prefer the soy protein. Myself, I can't stand the texture of the soy not to mention the taste. Others like it.
   — livnliter

May 1, 2002
One of the differences I was told about was that whey is better for muscle building. Men are better off taking whey than soy because of this and also because soy boosts your estrogen levels. I don't know if this is a problem for women, but I hear it is for men.
   — kyle S.

May 1, 2002
Whey is the MOST bioavailable form of protein. The supplements are smooth, usually tasty and a very small amount will deliver a big wad of protein. It's a derivative of milk, but the good products are usually lactose free. Soy is about #9 on the BV list, it tends to be gritty, thickens up on standing, needs to add a lot more liquid and many of the pre-flavored ones are high in sugar. HOWEVER, some people will do one soy shake a day and one whey shake. OR add a little soy to their whey shakes.
   — vitalady