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Old 10-06-2008, 10:42 AM   #5 (permalink)
Don Smith
 
Join Date: Feb 25 2000
Location: Tucson, AZ
Posts: 1,643
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Re: Vitamin D deficiency

First of all, the "rate of change" of your vitamin D (25-OH-D) level depends upon how low you are now. The lower the level, the "faster" the increase will be as you tan and take vitamin D supplements.

Regarding vitamin D supplements, please keep in mind that 70% - 80% of your vitamin D increase must come from UVR exposure and that it takes an "intake" of (approximately) 2600 IU daily (from both UVR exposure and supplements) just to meet your daily requirement. If you tan two times per week and take two 1,000 IU (for a total of 2,000 IU) vitamin D supplements per day (and "assuming" that you are at approximately 50 nmol/L now), you can expect to reach a level of 70-90 nmol/L in about 6 weeks and a level >120 nmol/L in about 10-12 weeks with this regimen.

Finally, the fact that you can have a toxic reaction from vitamin D supplements but not from UVR-induced vitamin D proves (once again) that Mother Nature really does know what she is doing.

[A question for Eileen. Why does Mother Nature get all of the credit? Isn't it possible that "Father Nature" controls things? Just wondering.]
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