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The average daily intake of β-carotene is in the range 2–7 mg, as estimated from a pooled analysis of 500,000 women living in the US, Canada, and some European countries. [21] Beta-carotene is found in many foods and is sold as a dietary supplement. [8] β-Carotene contributes to the orange color of many different fruits and vegetables.
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.
Also downregulated is the enzyme beta-carotene 15,15'-dioxygenase (formerly known as beta-carotene 15,15'-monooxygenase) coded for by the BCMO1 gene, responsible for symmetrically cleaving β-carotene into retinal. [8] Absorbed β-carotene is either incorporated as such into chylomicrons or first converted to retinal and then retinol, bound to ...
One pink grapefruit also provides 16% of the Daily ... However, pink varieties contain the most vitamins A and C and carotenoids, such as beta carotene and lycopene. ... Vitamin A: 1,410 IU ...
Plus, it’s loaded with iron and beta-carotene, the precursor to vitamin A — an important vitamin for hair growth and strength. Pumpkin also is full of vitamins C and E that help repair your ...
Researchers at the U.S. Agricultural Research Service have been able to identify genetic sequences in corn that are associated with higher levels of beta-carotene, the precursor to vitamin A. They found that breeders can cross certain variations of corn to produce a crop with an 18-fold increase in beta-carotene. [45]