A multivitamin is any preparation containing more than a single vitamin. Tablets and injectable forms (for example Vitaped and Hospira) are available. In common usage, "multivitamin" refers to tablets that contain various vitamins usually along with dietary minerals and, occasionally, herbal extracts. A vitamin is an organic molecule required by a living organism in minute amounts for proper health. ... Hospira, Inc. ... Dietary minerals are the chemical elements required by living organisms, other than the four elements Carbon, Hydrogen, Nitrogen, and Oxygen which are ubiquitous in organic molecules. ... Herbal extract is a liquid solution of herbs and alcohol. ...

Uses

By supplementing the diet with additional vitamins and minerals, multivitamins can be a valuable tool for those with dietary imbalances or different nutritional needs [1]. People with dietary imbalances may include those on restrictive diets and those who can't or won't eat a nutritious diet. Pregnant women and elderly adults have different nutritional needs, and a multivitamin may be indicated by their physician.

Orthomolecular medicine proponents generally recommend higher, individually optimized vitamin intakes. They recommend more absorbable forms of of vitamins and minerals, in inexpensive but higher potency formulas, spread across the day. Often iron-free formulas, sometimes copper-free formulas are preferred. Orthomolecular medicine or optimum nutrition emphasizes the use of natural substances found in a healthy diet such as vitamins, dietary minerals, enzymes, antioxidants, amino acids, essential fatty acids, dietary fiber and intestinal short chain fatty acids (SCFA) in the prevention and treatment of diseases. ...

Precautions

While multivitamins can be a valuable tool to correct dietary imbalances, it is worth exercising basic caution before taking multivitamins, especially if any medical conditions exist. Pregnant women should generally consult their doctor before taking any multivitamins. Severe vitamin and mineral deficiencies require medical treatment and cannot be treated with common over-the-counter multivitamins. Special vitamer or mineral forms with much higher potentcy are typically available as individual components, specialized formulations, or available by prescription.

Multivitamins may rarely be toxic if large doses of various vitamins or minerals are taken. In particular, these include vitamin A, vitamin D, vitamin B6, iron, and potassium. Total iron content of the whole bottle is the primary concern for child safety. There also are strict limits on the retinol content for vitamin A during pregnancy that are specifically addressed by prenatal formulas. This list is not exhaustive. Additionally, various medical conditions and medications may adversely interact with multivitamins. For normal adults taking a multivitamin for general health purposes, conventional medicine and government authorities recommend that a multivitamin should contain 100% DRI or less for each ingredient. However, many common brand supplements in the US use 100% - 200% of the DRI for certain vitamins or minerals. Higher potency versions of multivitamins, sometimes labelled as megavitamins, are available in the US. Retinol, the dietary form of vitamin A, is a fat-soluble, antioxidant vitamin important in vision and bone growth. ... Vitamin D is a fat soluble vitamin that contributes to the maintenance of normal levels of calcium and phosphorus in the bloodstream. ... Pyridoxine Vitamin B-6 is a water-soluble vitamin. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... General Name, Symbol, Number potassium, K, 19 Chemical series alkali metals Group, Period, Block 1, 4, s Appearance silvery white Atomic mass 39. ... Oral medication A medication is a licenced drug taken to cure or reduce symptoms of an illness or medical condition. ... Dietary Reference Intake is a set of guidelines set up in 1997 to give more detailed guidance than the RDA system which preceded it. ...

Regulations by governmental agencies

The United States of America

Because of their categorization as a dietary supplement by the FDA, most multivitamins sold in the U.S. are not required to undergo the same rigorous testing procedures typical of pharmaceutical drugs. The United States Food and Drug Administration is the government agency responsible for regulating food, dietary supplements, drugs, cosmetics, medical devices, biologics and blood products in the United States. ...

However, some multivitamins contain very high doses of one or several vitamins or minerals and therefore require a prescription in the U.S. Since such drugs contain no new substances, they do not require the same testing as would be required by a New Drug Application, but were allowed on the market as drugs due to the FDA's Drug Efficacy Study Implementation program. See 36 Fed. Reg. 6843 (Apr. 9, 1971). This is required before someone can sell an unapproved drug on the market. ... The United States Food and Drug Administration is the government agency responsible for regulating food, dietary supplements, drugs, cosmetics, medical devices, biologics and blood products in the United States. ... This was a program begun by the FDA in the 1960s after the requirement that all drugs be efficacious as well as safe. ...