Vitamins are essential micronutrients that the body needs in small amounts to maintain good health. There are 13 essential vitamins that the body needs, including vitamins A, C, D, E, K, and the B vitamins (thiamine, riboflavin, niacin, pantothenic acid, vitamin B6, vitamin B12, and folate).

Each vitamin has specific roles in the body, such as maintaining healthy skin and vision, supporting the immune system, and helping to convert food into energy.

Vitamins can be obtained through a balanced diet that includes a variety of fruits, vegetables, whole grains, and lean protein. Some vitamins, such as vitamin D, can also be obtained through exposure to sunlight. In some cases, a doctor may recommend a vitamin supplement if a person is not getting enough of a particular vitamin through their diet.

It is important to note that excessive intake of some vitamins can have negative effects, and it is always best to consult a doctor before taking any vitamin supplement.