How do vitamins work? Interesting animation to let you find out the function and source of all the vitamins - Vitamins A, B complex, C, D, E and K Video source: TED-Ed Vitamins are the building blocks that keep our bodies running; they help build muscle and bone, capture energy, heal wounds and more. But if our body doesn’t create vitamins, how do they get into our system? Ginnie Trinh Nguyen describes what vitamins are, how they get into our bodies -- and why they are so crucial. Lesson by Ginn