In this article, we will explore the 10 most important vitamins, their functions, their sources, and why they are so critical for survival. Along the way, we’ll uncover how these microscopic nutrients hold the key to vitality, longevity, and the prevention of disease. 1. Vitamin A – The Vision and Growth Vitamin. Vitamins are organic compounds that living organisms require in small amounts for the normal growth, metabolism, and health. Unlike carbohydrates, proteins, and fats, vitamins do not provide energy or serve as structural building blocks. One type comes from animal sources of food. It helps you see at night, make red blood cells, and fight off infections. The other type is in plant foods. It helps prevent damage to cells and an eye. All vertebrates, including humans, require dietary sources of vitamin A, vitamin D, thiamin, riboflavin, vitamin B 6, and pantothenic acid; some vertebrates, particularly the more highly evolved ones, have additional requirements for other vitamins. Vitamins and minerals are micronutrients required by the body to carry out a range of normal functions. However, these micronutrients are not produced in our bodies and must be derived from the food we eat. Vitamins are organic substances that are generally classified as either fat soluble or water soluble. Eating a colorful range of foods helps ensure your body gets the vitamins it needs. From vitamin A to vitamin K, experts share the ins and outs of these essential micronutrients. While some people may still need a supplement, most can get the nutrition they need from food. Vitamins are organic molecules (or a set of closely related molecules called vitamers) that are essential to an organism in small quantities for proper metabolic function. These essential nutrients cannot be synthesized in the organism in sufficient quantities for survival, and therefore must be obtained through consumption.