79611a05   
   XPost: misc.health.alternative, sci.med, sci.med.nutrition   
   XPost: sci.life-extension   
      
   > 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.   
   > =A0 __________________________________________________________________   
      
      
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