Sun, 7 Sep 2003 18:05
Amadeus Schmidt <[log in to unmask]> WROTE:

My books say storage capacity of retinol in humans is 1-2 years.  Shortest
lived is vitamin B1 and K (1-2 weeks) longest lived is B12 with 5-10 years.

Hi Amadeus,

Is your nutrition book available in English from Amazon.com?

BTW, recent research has shown Retinol is probably DANGEROUS to bone health
for many people long-term in doses much over 2000 IU per day.  Increases
fracture risk with osteo.  Most vitamin formulas have NOT lowered their
Retinol dosages yet, so it's a good idea everyone check their multi-vitamin
and/or Retinol dose.  About 800 to 1000 IU daily of Retinol is a safer
maintenance dose.


http://books.nap.edu/books/0309072794/html/82.html#page_top


The Harvard Health Newsletter reported on this in detail at:

http://www.hmiworld.org/past_issues/May_June_2002/around_vitaminA_pf.html


... Sweden has a very high hip fracture rate, and it isn't
just a problem for women.  The rate among Swedish men is higher
than among women in Great Britain, the Netherlands, and
Switzerland.  Experts have wondered whether vitamin A, and more
specifically retinol, might be to blame because there is so much
of it in the typical Swedish diet.  Retinol-rich cod liver oil
is a traditional medicine, consumed plain in the belief that it
will ward off assorted illnesses.  And Sweden is the only European
country that fortifies low-fat milk products with retinol.

In a study published in the Nov. 15, 1998, Annals of Internal Medicine,
Swedish researchers showed that for every 1,000-microgram increase in
retinol consumption, the risk of hip fracture rose by 68%.

Women estimated to have eaten 1,500 micrograms of retinol per day
had double the hip fracture risk of women with intakes at or below
500 micrograms.





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