A member asked:

Does vitamin d3 1000mcg help balance an underactive thyroid? and why is too much vitamin d3 toxic? how much is too much?

A doctor has provided 1 answer
Dr. Bradford Romans answered

Specializes in Internal Medicine

No.Low Thyroid: Is treated with the appropriate dose of l- thyroxine or similar thyroid rx.Vitamin d level can be measured, and if low, should be raised by vit d replacement.If truly low, replacement doses of up to 50, 000u/wk are initially given.It is very important to have normal levels.

Answered 12/21/2013

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