Insulin-like growth factor (IGF-1) is a natural hormone that has a growth-promoting effect on every cell in your body, particularly skeletal muscle. A study published in the journal Amino Acids examines whether your post-workout meal can influence the levels of this hormone released.

Researchers had 6 college-aged men complete a high intensity training routine before drinking a placebo, a carbohydrate beverage or a recovery beverage containing essential amino acids and carbohydrates. Although significant hormonal changes were seen in all 3 groups, significant increases in IGF-1 were realized with the essential amino acid + carbs beverage. What are you refueling with after a demanding session in the weight room? For an interesting study on leucine and citrulline, check out today’s Breaking News post at optimumnutrition.com