The Spartans were a society of warrior-heroes who were the living exemplars of such core values as duty, discipline, self-sacrifice, and extreme toughness. This book, written by one of the worldâs leading experts on Sparta, traces the rise and fall of Spartan society and explores the tremendous influence the Spartans had on their world and even on ours.
Essential nutrients need to be provided by the diet for proper functioning. An essential nutrient is a nutrient that the body cannot synthesize on its own -- or not to an adequate amount -- and must be provided by the diet.These nutrients are necessary for the body to function properly. The six essential nutrients include carbohydrates, protein, fat, vitamins, minerals and water.hese nutrients are necessary for the body to function properly. The six essential nutrients include carbohydrates, protein, fat, vitamins, minerals and water.
1 Numerous large studies of calcium plus vitamin D have not conclusively shown an increased risk of heart problems.  Calcium and vitamin D are essential nutrients for bone health. Though food remains the best source of calcium, some people may need additional calcium in the form of supplements.