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  1. Vitamin - Wikipedia

    In humans there are 13 vitamins: 4 fat-soluble (A, D, E, and K) and 9 water-soluble (8 B vitamins and vitamin C). Water-soluble vitamins dissolve easily in water and, in general, are readily …

  2. Vitamin | Definition, Types, & Facts | Britannica

    Jan 2, 2026 · Biochemists traditionally separate them into two groups, the water-soluble vitamins and the fat-soluble vitamins. The common and chemical names of vitamins of both groups, …

  3. Vitamin and Mineral Supplement Fact Sheets

    These include vitamins, minerals, herbs and botanicals, probiotics, and more. Many of these resources are available in versions written for health professionals and for consumers (in both …

  4. Vitamins: MedlinePlus Medical Encyclopedia

    Jan 21, 2025 · Vitamins are a group of substances that are needed for normal cell function, growth, and development.

  5. Vitamins and Minerals - The Nutrition Source

    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 …

  6. Dietary supplements: Are these 14 common vitamins and ...

    Jun 15, 2025 · Which dietary supplements are beneficial and which might be a waste of money? An expert gives facts on which vitamins and supplements work.

  7. What are vitamins, and how do they work? - Medical News Today

    Oct 5, 2023 · This article explains what vitamins are, what they do, and which foods are good sources. Follow the links in blue below for more information about each vitamin.