A vitamin is an organic molecule (or related set of molecules) that is an essential micronutrient that an organism needs in small quantities for the proper functioning of its metabolism.Essential nutrients cannot be synthesized in the organism, either at all or not in sufficient quantities, and therefore must be obtained through the diet. Vitamin C can be synthesized by some species but not by ...

Save big on top quality vitamin & supplement brands. Save an additional 10% with auto delivery subscriptions. From protein powders and probiotics to collagen & keto diet basics, The Vitamin Shoppe has all your best-self-supplies.

Introduction. Vitamin A is the name of a group of fat-soluble retinoids, including retinol, retinal, and retinyl esters [].Vitamin A is involved in immune function, vision, reproduction, and cellular communication [1,4,5].Vitamin A is critical for vision as an essential component of rhodopsin, a protein that absorbs light in the retinal receptors, and because it supports the normal ...

* Adequate Intake (AI) Sources of Vitamin D Food. Very few foods in nature contain vitamin D. The flesh of fatty fish (such as salmon, tuna, and mackerel) and fish liver oils are among the best sources [1,11].Small amounts of vitamin D are found in beef liver, cheese, and egg yolks.

Shop Vitamin World for high-quality vitamins, nutritional supplements and herbs at a great value. Find the products you need for overall health and wellness!

The body produces vitamin D in response to sun exposure. Vitamin D has a range of benefits. It protects the teeth and bones and defends against diseases, including cancer and multiple sclerosis.

Vitamin E is an important vitamin required for the proper function of many organs in the body. It is also an antioxidant. This means it helps to slow down processes that damage cells. More ...

Vitamin D is necessary for building and maintaining healthy bones. That's because calcium, the primary component of bone, can only be absorbed by your body when vitamin D is present.