What vitamin is good to build memory?

B vitamins are involved in energy management, which means mental processes, emotions, and psychological symptoms. There are 13 to 17 of them, depending on who does the counting. A popular source of B vitamins is nutritional yeast. People who want pills take B-100. They work together, so you don't really want to take doses of individual vitamins. You should study some books about nutrition so you know these things and can choose healthful foods.