Magnum Vitamins® Zinc Plus Contains 20 Vitamins and Minerals Help Support Thick, Youthful Looking Hair, Skin, and Nails. Some supplements only offer Biotin as an ingredient. Magnum Vitamins® Zinc Plus includes 20 complete ingredients. With Magnum Vitamins® Zinc Plus, you get more ingredients to support your hair, skin and nails for your money. Biotin, or Vitamin B7, is a water-soluble vitamin that’s a part of the vitamin B complex a group of key nutrients needed for healthy metabolic, nerve, digestive and cardiovascular functions. Biotin is a nutrient that helps us keep a young, attractive appearance since it plays a major part in maintaining the health of our hair, nails and skin. In fact, biotin sometimes gets the nickname the “H” vitamin, which stems from the German words Haar and Haut that mean “hair and skin.” Magnum Vitamins® Zinc Plus contains 5000 mcg of Biotin‡.