Your pre-workout meal is just as important as your post-workout meal. You need to make sure you fuel your body before your workouts. Training fasted is not optimal for muscle gains. Without adequate fuel your workouts will not be as productive or intense as they should be.
Definition of vitamin for English Language Learners. : 1  a natural substance that is usually found in foods and that helps your body to be healthy. : 2  a pill containing vitamins.
Vitamins: Introduction and Index. Vitamins are organic molecules that are necessary for normal metabolism in animals, but either are not synthesized in the body or are synthesized in inadequate quantities. Consequently, vitamins must be obtained from the diet. Most vitamins function as coenzymes or cofactors.itamins are organic molecules that are necessary for normal metabolism in animals, but either are not synthesized in the body or are synthesized in inadequate quantities. Consequently, vitamins must be obtained from the diet.