They measure vitamin D using one of two measurements: nanomoles per liter (nmol/l) or nanograms per milliliter (ng/ml). The following table provides rough ranges for low, normal, and high vitamin ...

The main complication of vitamin D toxicity is hypercalcemia, which is higher-than-normal levels of calcium ... you whether they are in the healthy range or if supplementation is necessary.

Below, we walk you through everything you need to know about vitamin D and how to get your levels in the proper place.

There has been no consensus on the optimal level of vitamin D intake to reduce PTH, and this is why many laboratories report the normal range of vitamin D to be so wide (20 to 40 ng/ml ...

Medically reviewed by Erika Prouty, PharmD Vitamin D helps maintain bone health and is found in certain foods, supplements, ...

By Fernando Riveron, MD Consider the miracle  that cells in your skin can gather up solar radiation in the form of sunlight ...

As a doctor who helps patients heal hair loss from the inside out, I learned that one of the most overlooked yet crucial ...

Vitamin D is widely known for boosting bone health, muscle strength and immune function, but it also has a range of other benefits — including cancer prevention. A new study published in the ...