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β-Carotene (beta-carotene) is an organic, strongly colored red-orange pigment abundant in fungi, [7] plants, and fruits. It is a member of the carotenes , which are terpenoids (isoprenoids), synthesized biochemically from eight isoprene units and thus having 40 carbons .
One RE is equivalent to 0.001 mg of retinol, or 0.006 mg of β-carotene, or 3.3 International Units of vitamin A. Vitamin A is fat-soluble and is stored in the liver and fat tissue. [ 45 ] When required by a particular part of the body, the liver releases some vitamin A, which is carried by the blood and delivered to the target cells and tissues.
In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances. International units are used to quantify vitamins and biologics ( hormones , some medications , vaccines , blood products and similar biologically ...
However, pink varieties contain the most vitamins A and C and carotenoids, such as beta carotene and lycopene. One half of a pink grapefruit provides: ... Vitamin A: 1,410 IU. Vitamin C: 38 mg.
860 mg 800 mg 810 mg Beta-carotene: 120 IU 177 IU 2658 IU Vitamin E: 2900 mcg 220 mcg 580 mcg Vitamin C: 1 mg 25.3 mg 8 mg Vitamin B 12: 0.30 mcg 0 mcg 0 mcg Phosphorus: 21 mg 19 mg 14 mg Magnesium: 8 mg 6 mg 22 mg Calcium: 7.2 mg 13 mg 28 mg Iron: 0.66 mg 0.21 mg 0.77 mg Potassium: 42 mg 90 mg 158 mg
Vitamin A occurs as two principal forms in foods: A) retinoids, found in animal-sourced foods, either as retinol or bound to a fatty acid to become a retinyl ester, and B) the carotenoids α-carotene (alpha-carotene), β-carotene, γ-carotene (gamma-carotene), and the xanthophyll beta-cryptoxanthin (all of which contain β-ionone rings) that ...
A template (that is US-centric) for recording the nutritional value of foods. SI units must be inserted manually with a {{nbsp}} between the unit and the value. (g = grams, μg = micrograms, IU = international units). Percentage daily value (%DV) are roughly. estimated using US recommendations for adults from the USDA. Template parameters [Edit template data] This template prefers block ...
Elevated serum beta-carotene does not necessarily result in carotenosis, but the latter is likely to show up when intake is more than 20 mg/day. Average adult intake in the U.S. around 2.3 mg/day. One medium-sized carrot has about 4.0 mg. [citation needed] Carotenoderma can be divided into two major types, primary and secondary.