Yes and no. Your body lives off of energy. We get that energy from food. And water. Food contains vitamins and food gives us energy (as said above). If you take extra vitamins your body will feel more awake because of that extra "boost."
So first of all i need to know what it the thing they are asking that would influence the person? What is the action? Based on you're comment below I will then comment back with the answer, Thank You
