Talk:Retinyl palmitate
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What is it made from?
editWhat is Vitamin A palmitate made from? Badagnani (talk) 07:57, 22 November 2007 (UTC)
What is it made from? Badagnani (talk) 03:45, 29 April 2008 (UTC)
What is it made from? Badagnani (talk) 04:11, 17 March 2009 (UTC)
What is it made from? Badagnani (talk) 07:47, 3 July 2009 (UTC)
- Apparently the pith (inner core) of the palm tree. 216.99.198.2 (talk) 07:31, 25 February 2012 (UTC)
Why, by the year 2017, does the article not state what it is made from? 173.88.241.33 (talk) 23:50, 25 May 2017 (UTC)
Dosage - corrected a very important mistake
editRetinyl palmitate is considered a preformed vitamin A, indeed. Therefore it SHOULD NOT be overdosed, there is a maximum daily allowance for it. The statement :"It is a pre-formed version of vitamin A, and can thus be realistically over-dosed, unlike beta-carotene" is a huge error. In fact even the reference mentioned in this article is contradicting the statement about overdosing. It is the other way around: beta-carotene can be realistically overdosed! About 1/12 of the ingested dietary beta-carotene is absorbed and transformed in vitamin A. See Equivalencies of retinoids and carotenoids (IU)in [1] In consequence I corrected this sentence to: "It is a pre-formed version of vitamin A, therefore the intake should not exceed the Recommended Dietary Allowance (RDA). Overdosing preformed Vitamin A forms such as retinyl palmitate lead to adverse physiological reactions (hypervitaminosis A)."
Also I corrected that retinyl palmitate rather than palmitate is an antioxidant. In many instances I removed "named colloquially palmitate" because this is incorrect and misleading, for ex. Retinyl palmitate is an antioxidant but palmitate radical is not. I know many palmitates, each one a distinct chemical. Sodium palmitate is a soap. Cristian —Preceding unsigned comment added by 24.87.40.173 (talk) 18:23, 7 November 2009 (UTC)
So this is safe to eat (if recommended amount is not exceeded), and possibly unsafe to put on skin?
editThis is synthetic, so perhaps less healthy than natural Vitamin A to eat?
91.155.24.127 (talk) 21:00, 21 April 2017 (UTC)
- Not that I know of, though if you can find a good source add it. I5-X600K (talk) 15:04, 5 November 2020 (UTC)
How and when is it converted to retinol
editIf taken orally, injected, or absorbed through the skin - how is it converted to retinol. Does it require an enzyme ? Does the ester break down in stomach acid ? - Rod57 (talk) 10:12, 5 February 2018 (UTC)