A member asked:

My vitamin d tested @30. can this cause muscle fatigue? started 5000iu of vit. d, how long before feel affects?

A doctor has provided 1 answer

Vitamin D Level: Muscle fatigue among a host of other health related issues, may occur with low d levels. Keep in mind that vitamin d should be in an oil base when taken. Also be aware that you only absorb ~35% of an oral dose. Most efficient route is sub-lingual.

Answered 4/18/2014

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A member asked:

Can very low vitamin d cause extreme fatigue and dizziness?

A doctor has provided 1 answer