- vitamin a,
- vitamin a acid,
- vitamin a aldehyde,
- vitamin a1,
- vitamin a2
Origin of vitamin
Examples from the Web for vitamin
I take calcium and vitamin D supplements, but prescription medications are generally only for women in menopause.
The irony in it all is that our bodies need, if not crave, Vitamin D—and more than a chewable tablet.
The summertime staple is also a good source of potassium, vitamin A and vitamin C. 2.
At 96 percent water, cukes have no saturated fat or cholesterol, and are very high in vitamin K, vitamin B6 and iron.
Vitamin D3—Most of you reading this are probably vitamin D deficient if you wear clothes and work indoors.These Are The 15 Supplements to Keep In Your Medicine Cabinet|Ari Meisel|December 28, 2013|DAILY BEAST
Instead of a camera he found a device for distilling fresh water from salt, some iron rations, and a small bottle of vitamin B1.Sally Scott of the Waves|Roy J. Snell
Digestibility, as well as protein, mineral and vitamin requirements, must also be considered.How to Live|Irving Fisher and Eugene Fisk
Moreover, he had isolated a vitamin in this protein not found in any of man's present foods.Tom Swift and the Electronic Hydrolung|Victor Appleton
The name "vitamin" has been given to these substances, but little is known about their chemical or physiological nature.Food Poisoning|Edwin Oakes Jordan
The essential element of foods is the vitamin, a nitrogenous substance of indeterminate nature.The Goat-gland Transplantation|Sydney B. Flower
Word Origin for vitamin
1920, originally vitamine (1912) coined by Polish biochemist Casimir Funk (1884-1967), from Latin vita "life" (see vital) + amine, because they were thought to contain amino acids. The terminal -e formally was stripped off when scientists learned the true nature of the substance; -in was acceptable because it was used for neutral substances of undefined composition. The lettering system of nomenclature (Vitamin A, B, C, etc.) was introduced at the same time (1920).
A Closer Look
Although it has been known for thousands of years that certain diseases can be treated with specific foods, the scientific link between vitamins and good health wasn't made until the early 1900s by Polish-born American biochemist Casimir Funk. While studying beriberi, a disease that causes depression, fatigue, and nerve damage, Funk discovered an organic compound in rice husks that prevents the illness. He named the compound vitamine, derived from the chemical name amine and the Latin word vita, "life," because vitamins are required for life and were originally thought to be amines. Funk's compound is now known as vitamin B1, or thiamine. His research and discovery led him, along with English biochemist Sir Frederick Gowland Hopkins, to propose the vitamin hypothesis of deficiency, which stated that certain diseases, such as scurvy or rickets, are caused by dietary deficiencies and can be avoided by taking vitamins. Further research allowed scientists to isolate and identify the vitamins that we know today to be essential for human health. Vitamins include A, C, D, E, K, thiamine, riboflavin, niacin, B6, B12, folic acid, biotin, and pantothenic acid. Vitamins are distinguished from minerals, such as calcium, iron, and magnesium, which are also essential for optimum health.