Q: are protein vitimains like whey a good source of protein??

A: Whey powder is not a vitamin, but, yes, it's a very good source of protein. Just as with fats and carbs, ideally you want to get your protein from a variety of 'real' foods -- meats, fish, poultry, dairy, legumes, nuts and seeds, whole grains, and veggies. But if you are having difficulty getting enough protein from these sources whey powder is an excellent supplement. You may want to check out my Protein Supplements article.