79611a05
XPost: misc.health.alternative, sci.med, sci.med.nutrition
XPost: sci.life-extension
From: john.h.gohde@gmail.com

On Jun 17, 5:33 pm, viity guyy wrote:
> Upper and Lower Limits for Vitamin D
> The safe upper limit of vitamin D has been identified for the first
> time. A study of more than a million people older than 45 shows that
> having blood levels of calcidiol (hydroxyl vitamin D) below 20ng/mL (50
> nmol/L) or above 36 ng/mL (90 nmol/L) increases risk for heart attacks
> and premature death (J Clin Endocrinol Metab, published online March
> 26, 2013). An overdose, as well as a deficiency, of vitamin D markedly
> increases heart attack risk.
> A major function of vitamin D is to increase absorption of calcium from
> the intestines. Some people who take vitamin D supplements raise their
> blood levels of calcium as well as vitamin D above normal. These people
> are at increased risk for heart attacks and premature death.
> The only dependable blood test for vitamin D deficiency is called
> calcidiol or hydroxy-vitamin D. If you have a calcidiol level below 20
> ng/mL, you can raise it to 32 ng/mL by taking 30 g (1200 IU) per day.
> If your blood level of calcidiol is 30 ng/mL, you need to take 5 g
> (200 IU) per day, to raise blood levels to 32 ng/mL. If your blood
> calcidiol level is too high (above 90 nmol/L), check with your doctor
> about reducing your dose of vitamin D pills.
>   __________________________________________________________________


Citation ...

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