What Do Vitamins and Minerals Do? Vitamins and minerals increase the protected system; hold up usual increase and expansion, and assist cells and organs do their jobs. For example, you've almost certainly heard that carrots are good for your eyes. It's true! Carrots are full of substances called carotenoids that your body converts into vitamin A, which helps avert eye problems. Another vitamin, vitamin K, helps blood to clot. You'll locate vitamin K in green leafy vegetable, broccoli, soybeans, and oatmeal. And to have physically powerful bones, you require eating foods such as milk, yogurt, and green leafy vegetables, which are wealthy in the mineral calcium.