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 are organic compounds found in very small amounts in food and required for normal functioningâindeed, for survival. Humans are able to synthesize certain vitamins to some extent. For example, vitamin D is produced when the skin is exposed to sunlight; niacin can be synthesized from the amino acid tryptophan; and vitamin K and biotin are synthesized by bacteria living in the gut.