1 doctor weighed in:

My vitamin d level is 18. Can vitamin d levels decrease all of the sudden? Or is a deficiency more of a gradual thing that took several months/years?

1 doctor weighed in
Dr. David Sneid
Internal Medicine - Endocrinology

In brief: It usually takes

Weeks to months and is more common after the winter due to decreased sunlight exposure.
Luckily, replacement is inexpensive and safe. Discuss w/your doctor.

In brief: It usually takes

Weeks to months and is more common after the winter due to decreased sunlight exposure.
Luckily, replacement is inexpensive and safe. Discuss w/your doctor.
Dr. David Sneid
Dr. David Sneid
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