Some seniors do not repond to 1600 IU of vitamin D

Half of seniors did not respond to 1600 IU of vitamin D daily for a year

RED square = reduction in serum level

from slide presentation: https://www.VitaminDWiki.com/tiki-index.php?page_id=2269

Possible reasons for non-response include, but are not limited to, the following

• Lacking co-factors Magnesium, etc.

• Surgery or other trauma during the year decreased vitamin D levels

  • Taking drugs by seniors was associated with about 2 ng less vitamin D – March 2012

• Taking drugs such as Statins, Antiseizure, Prednisone, Orlistat, Questran, Dilatin, Phenobarbital, and Rifampin,

• Non-alcoholic Fatty Liver Disease (4 in 10 seniors) and Vitamin D

• People with gut problems are low on vitamin D

• Poor kidney function or poor endocrine function – to make the active form of vitamin D

See also VitaminDWiki

• 1600 IU vitamin D was enough to get all (white, non-obese) elderly to 20 ng – RCT Dec 2012

• Overview Seniors and Vitamin D

• Reasons for low response to vitamin D not just seniors