They therefore proposed that carotene is a provitamin, an immediate precursor to. From Wordnik.com. [Richard Kuhn and the Chemical Institute: Double Bonds and Biological Mechanisms] Reference
The source of Vitamin A in fruits and vegetables comes from carotene, a provitamin that is a precursor to Vitamin A. From Wordnik.com. [Chapter 6] Reference
It is bright green in color, thus indicating proper curing, a high carotene or provitamin A content, and palatability. From Wordnik.com. [Chapter 5] Reference
For example, in skin vitamin D is produced from UV-B-induced photoconversion of 7-dehydrocholesterol (7-DHC; provitamin D). From Wordnik.com. [Potential impacts of direct mechanisms of climate change on human health in the Arctic] Reference
All these plants are excellent sources of beta carotene provitamin A, vitamin C, calcium, iron sodium, potassium, phosphorus, and sulfur. From Wordnik.com. [THE NATURAL REMEDY BIBLE] Reference
For little effort, they afford a nutritious dish with abundant provitamin A, a vitamin particularly necessary in the tropics for eye health. From Wordnik.com. [1 Introduction] Reference
The stress of the bad hip fracture and recovery may have catalyzed cancer onset, because provitamin D is converted to its active form, D3, by a hormone called ACTH that is responsive to biological stress. From Wordnik.com. [lavoir - French Word-A-Day] Reference
It can be considered proved, therefore, that ergosterol, or possibly a sterol, the physiological effects of which correspond completely with those of ergosterol, constitutes the antirachitic provitamin, i.e. the mother substance of vitamin. From Wordnik.com. [Nobel Prize in Chemistry 1927 and 1928 - Presentation Speech] Reference
It has provitamin B and vitamin E which keeps her hair healthy and shiny. From Wordnik.com. [Modern Mom] Reference
A new variety of rice modified to produce high amounts of provitamin A, named. From Wordnik.com. [ScienceBlogs Channel : Life Science] Reference
Vitamin A, provitamin A vitamin E serum concentrations cystic fibrosis patients. From Wordnik.com. [MyLinkVault Newest Links] Reference
This doesn't seem very likely especially since the plant already makes provitamin A in the leaves. From Wordnik.com. [Museum Blogs] Reference
Carotenoids play an important role in human health by acting as sources of provitamin A or as protective antioxidants. From Wordnik.com. [Medindia Health News] Reference
This means that if a corn plant has that less active variant, more provitamin A is accumulated in the grain because it is not transformed into zeaxanthin. From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
Because cholecalciferol does not quality as the fully active form of vitamin D3 in humans, it is often referred to as "provitamin D" (or "provitamin D3"). From Wordnik.com. [The World's Healthiest Foods] Reference
Increase of beta-carotene in corn improves human health scientists that have uncovered the mechanism by which the amount of beta-carotene, or provitamin A, is. From Wordnik.com. [WN.com - Articles related to In memory of Mother: Why are vitamin supplements important part two] Reference
The rice plant does make provitamin A in its leaves, just not in the part we eat. decided to create a strain of rice that would make provitamin A in the rice kernel. From Wordnik.com. [Museum Blogs] Reference
Lacura ingredients include bioflavonoids, coenzyme Q10, a special retinol complex, hydrating sea minerals, provitamin B5, aloe vera, vitamins E and C, allantoin and other active extracts. From Wordnik.com. Reference
They are also rich in vitamins E, B1, B2 (riboflavin), B6 and provitamin A. Plums provide a source of potassium, thiamin and boron which is believed to help in the prevention of osteoporosis. From Wordnik.com. [eHow - Health How To's] Reference
HarvestPlus and concentrates on putting the three micronutrients that underlie most deficiency diseases - provitamin A, iron and zinc - into seven crops that dominate the diets of the rural poor. From Wordnik.com. [New Scientist - Online News] Reference
They also contain a natural pigment known for provitamin A and have been associated with protection against cancer, cardiovascular diseases, cataracts and macular degeneration as well as enhancing the immune response. From Wordnik.com. [Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7] Reference
"The idea of the study was trying to identify genes that are associated with increased levels of beta-carotene, which is a provitamin A compound, and that means when humans consume it, the beta-carotene can be metabolized into vitamin A," said Salas-Fernandez. From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
Recent advancements in biotechnology have created an additional avenue for addressing VAD: biofortification-using genetic recombinant technology to develop genetically modified (GM) fortified products with enhanced expression of provitamin A carotenoids, such as vitamin A-enhanced rice, or "golden rice". From Wordnik.com. [PLoS ONE Alerts: New Articles] Reference
I have no reference readily at hand, but it has been posited that the reason that skin color evolved as it did was that 1) there are optimal levels of Vitamin D, and both a deficit and an excess causes health problems, including lassitude and bone problems, 2) Vitamin D is ingested as a pro-vitamin form that does not have the biological activity of Vitamin D, and 3) Vitamin D is created by the action of ultraviolet light from sunlight) penetrating through the outer layers of the skin into capillaries and striking the provitamin molecules, converting them to Vitamin D. From Wordnik.com. [Who’s White: Debriefing] Reference
The "pro" in this word "provitamin" means the same thing as "preliminary form.". From Wordnik.com. [The World's Healthiest Foods] Reference
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