You will not find a better supplement for protecting the body and improving night vision than vitamin A.Vitamin A: it's host Michael Schwartz's favorite nutrient for multiple reasons.  You will not find a better supplement for protecting your body and improving night vision. Vitamin A is vitally important to have a great night vision, because night is a time for preporation for the next day. This is why you have dreams. Night can also be symbolic of doubt. When you can see into the doubt and understand its root, that allows you to manifest your confidence and courage.