A member asked:

In may 2015 vita d was 22. i take 2k daily during winter but decided to double dosage every other day. just noticed now urine bright yellow. stop it?

A doctor has provided 1 answer
Dr. Alvin Lin answered

Vitamin D deficiency: 1,000 international units (IU) of Vitamin D will typically raise 25OH D level by 10ng/mL (30-100ng/mL is considered normal reference range). Vitamin D supplementation does not affect urine color. But vitamin B supplements can turn urine bright yellow.

Answered 12/30/2015

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