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.
Note that the use of the term mineral here is distinct from the usage in the geological sciences. Vitamins are organic chemicals that a given living organism requires in trace quantities for good health, but which the organism cannot synthesize, and therefore must obtain from its diet.