Zita West Vitamen - Ultimate Male Fertility Supplement - 30 Capsules (1 Months Supply)

Product Information

a b Czarnewski P, Das S, Parigi SM, Villablanca EJ (January 2017). "Retinoic Acid and Its Role in Modulating Intestinal Innate Immunity". Nutrients. 9 (1): 68. doi: 10.3390/nu9010068. PMC 5295112. PMID 28098786. There are causes for deficiency other than low dietary intake of vitamin A as retinol or carotenes. Adequate dietary protein and caloric energy are needed for a normal rate of synthesis of RBP, without which, retinol cannot be mobilized to leave the liver. Systemic infections can cause transient decreases in RBP synthesis even if protein-calorie malnutrition is absent. Chronic alcohol consumption reduces liver vitamin A storage. [4] Non-alcoholic fatty liver disease (NAFLD), characterized by the accumulation of fat in the liver, is the hepatic manifestation of metabolic syndrome. Liver damage from NAFLD reduces liver storage capacity for retinol and reduces the ability to mobilize liver stores to maintain normal circulating concentration. [75] Animal requirements [ edit ]

Newer research has shown that the absorption of provitamin-A carotenoids is only half as much as previously thought. As a result, in 2001 the US Institute of Medicine recommended a new unit, the retinol activity equivalent (RAE). Each μg RAE corresponds to 1 μg retinol, 2 μg of β-carotene in oil, 12 μg of "dietary" beta-carotene, or 24 μg of the three other dietary provitamin-A carotenoids. [4] Substance and its chemical environment (per 1 μg) a b Davidson, Michael W. (2004) Anthranilic Acid (Vitamin L) Florida State University. Retrieved 20-02-07. a b Bender DA (2003). Nutritional biochemistry of the vitamins. Cambridge, U.K.: Cambridge University Press. ISBN 978-0-521-80388-5.In setting human nutrient guidelines, government organizations do not necessarily agree on amounts needed to avoid deficiency or maximum amounts to avoid the risk of toxicity. [57] [11] [58] For example, for vitamin C, recommended intakes range from 40mg/day in India [63] to 155mg/day for the European Union. [64] The table below shows U.S. Estimated Average Requirements (EARs) and Recommended Dietary Allowances (RDAs) for vitamins, PRIs for the European Union (same concept as RDAs), followed by what three government organizations deem to be the safe upper intake. RDAs are set higher than EARs to cover people with higher than average needs. Adequate Intakes (AIs) are set when there is not sufficient information to establish EARs and RDAs. Governments are slow to revise information of this nature. For the U.S. values, with the exception of calcium and vitamin D, all of the data date to 1997–2004. [65] Kögl and Tönnis (1936). "Über das Bios-Problem. Darstellung von krystallisiertem Biotin aus Eigelb. 20. Mitteilung über pflanzliche Wachstumsstoffe". Hoppe-Seyler's Zeitschrift für Physiologische Chemie. 242 (1–2): 43–73. doi: 10.1515/bchm2.1936.242.1-2.43. Animal research (on mice), which is pre-clinical, also found Retinoid acid, the bioactive metabolite of vitamin A, to have an effect on brain areas responsible for memory and learning. [104] Cancer [ edit ] The Nobel Prize in Physiology or Medicine 1967". Nobel Foundation. Archived from the original on 4 December 2013 . Retrieved 28 July 2007. Publishing, Harvard Health (9 June 2009). "Listing of vitamins". Harvard Health . Retrieved 12 May 2020.

Kutsky, R.J. (1973). Handbook of Vitamins and Hormones. New York: Van Nostrand Reinhold, ISBN 0-442-24549-1 However, about 45% of people carry a genetic mutation that significantly reduces their ability to convert provitamin A into vitamin A ( 24, 25). The value of eating certain foods to maintain health was recognized long before vitamins were identified. The ancient Egyptians knew that feeding liver to a person may help with night blindness, an illness now known to be caused by a vitamin A deficiency. [24] The advancement of ocean voyages during the Age of Discovery resulted in prolonged periods without access to fresh fruits and vegetables, and made illnesses from vitamin deficiency common among ships' crews. [25] The discovery dates of the vitamins and their sources Ye X, Al-Babili S, Klöti A, Zhang J, Lucca P, Beyer P, Potrykus I (January 2000). "Engineering the provitamin A (beta-carotene) biosynthetic pathway into (carotenoid-free) rice endosperm". Science. 287 (5451): 303–305. Bibcode: 2000Sci...287..303Y. doi: 10.1126/science.287.5451.303. PMID 10634784. S2CID 40258379. You can easily meet your requirements for vitamin A by regularly eating some of the foods listed in this article. Many foods also contain added vitamin A, including cereals, margarine, and dairy products.The term "vitamin" was derived from "vitamine", a compound word coined in 1912 by the biochemist Casimir Funk while working at the Lister Institute of Preventive Medicine. [31] Funk created the name from vital and amine, because it appeared that these organic micronutrient food factors that prevent beriberi and perhaps other similar dietary-deficiency diseases were required for life, hence "vital", and were chemical amines, hence "amine". This was true of thiamine, but after it was found that vitamin C and other such micronutrients were not amines, the word was shortened to "vitamin" in English. [44] Classification ounces (oz), or 100 grams (g), contains 7,730 mcg of retinol, or 859% of the DV ( 4). 2. Lamb liver, cooked Vitamin A supplementation coverage rate (children ages 6–59 months)". Our World in Data . Retrieved 6 March 2020.