My wife's physician has told her that Vit D deficiency takes months (6 or so) of supplementation to restore to a normal level. Getting sun exposure is an important need. Older people often have a decreased ability to get Vit D from sun exposure. High longitude (above 42 degrees) makes sun exposure much less effective in the six colder months.

kate, It is good to hear that your doc tested you for Vit B-12. Maybe the 1000 mcg is good for you. It will be interesting to see a follow up B-12 test.

Sometimes, they test for Vit D. Some studies claim that the tests are prone to underestimating the Vit D deficiency since it has so many forms in the body before it gets to the usable form.

As mrsD said, get a look at the real numbers from the lab work. Is your doc using 'old school' standards or is he using more current values?


The RDA as prescribed by our FDA is woefully inadequate.