Vitamins are only organic compounds used by the body for important functions. There are two categories of vitamins: soluble in water and soluble in fat. The body needs nine water-soluble vitamins. Many vitamins that dissolve in water are precursors for coenzymes for intermediary metabolic enzymes. Water-soluble vitamins are not stored in the body. What is not used will be excreted in the urine.
Vitamin D has many benefits to health. Musculoskeletal problems are more common in those with vitamin D deficiency/insufficiency. You can buy the Vitamin D3 to get the health benefits.
Vitamin B12 also known as cobalamin is an important water-soluble vitamin. Vitamin B12 is very important for DNA synthesis. Vitamin B12 is also part of a red blood cell ring that carries oxygen. Pernicious anemia is associated with vitamin B12 deficiency. Vitamin B12 deficiency is rarely a result of vitamin absence in food. Many develop destructive anemia and have no intrinsic factors, which bind to vitamins for absorption purposes.
Riboflavin (vitamin B2) is a water-soluble vitamin that helps convert fat, sugar, and protein into energy. Riboflavin is needed to improve and maintain healthy skin. Riboflavin also helps in regulating the acidity of the body. There are no diseases associated with riboflavin deficiency. However, riboflavin deficiency usually accompanies other vitamin deficiencies.
Vitamin A or Retinol is an important vitamin that is fat-soluble. Vitamin A is an antioxidant that protects the body from damage to free radicals. Vitamin A also protects against many infections.