Protein Guide: Benefits of Shakes, Whey & Lean Sources

Protein shakes can be beneficial for hair and muscle growth, but too much protein may cause kidney damage. Identify the best lean sources like beans and eggs while understanding the differences between whey and casein for your diet.

Is Peanut Butter a Complete Protein?

Published Jul,08 2011 | By Rebecca Slayton

Protein is an essential nutrient that your body needs. Your body is constantly breaking down proteins in your cells, organs and tissues. Protein from the food you eat, breaks down into amino acids that replace proteins in your body.