Vitamin A
The molecules that make up the category vitamin A are all part of a group of compounds that exhibit the biological activity of retinol. Most dietary vitamin A is obtained from carotenoids or from animal tissues with high vitamin A content. Being a lipid-soluble vitamin, this nutrient in either large or chronic amounts can […]

Whether vitamin needs differ among athletic and sedentary individuals has been an intense area of debate. Coaches, athletes, and parents often search for ways to produce bigger, faster, and stronger athletes. In ancient Greece, this was accomplished by using paidotribes or gymnaste (trainers) and later by the advice of Celcus (24 AD).Celcus has written eight […]