Re: Safest Form of Vitamin A?

[Guest guest]

>

> Dear Dr. Cutler,

>

> I have another question .....

>

> There appear to be two major sources of Vitamin A.

>

> 1. from fish liver oil (retinol I think)- .

>

> 2. Retinyl palmitate - synthetic I think

These are both fine.

>

> Our instincts tell us to go with the natural form (#1) but there appear to be

reports of Hg in fish supplements

Merucury does not partitition into the oil, and you don't consume that much oil.

It isn't an issue. Also a lot of them are salmon or herring or mackerel derived

and those are low mercury fish.

>(http://www.mercurynews.com/ci_14501591). There are reports that Retinyl

palmitate in skin applications can cause skin cancer.

(http://www.nydailynews.com/lifestyle/health/2010/06/14/2010-06-14_chuck_cool_on\

_sunscreen.html).

Don't play gin rummy with news articles or pubmed abstracts. If you think it is

relevant, get the paper and read it enough to decide if the report you saw

accurately reflects its content - usually it does not. If it does, then having

the paper makes it easier to discuss.

More or less everything causes cancer. Sun. Food. Drugs. Anticancer drugs. Etc.

The question is how much and whether the risk is significant. I'd worry a lot

more about the 'strip search' scanners at the airport, or the CT scan you

usually end up with if you go to the hospital.

> Given that the AC supplements are so high.....

Why do you say they're high? MD's used to Rx a lot more than I recommend before

accutane became available by prescription. They only started pretending that

adequate doses of vitamin A were harmful AFTER that so they could scare people

into paying for the drug which is far more expensive than vitamin A.

> which would be the safest one for children?

They'r both fine.

> thanks,

> tom

Andy

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