Most women struggle to get enough of this essential vitamin.

Eating citrus fruits at optimal times may help maximize vitamin C benefits—and minimize any side effects. Here's what to know ...

High-dose vitamin C supplements do not prevent heart disease and may increase health risks. Excess vitamin C can cause side ...

In addition to fatigue, other symptoms of vitamin D deficiency include increased sweating, joint pain, muscle aches, and ...

Some medications, limited diets, and health conditions can deplete your B12 levels. This essential vitamin can support brain ...

Support your immune system with these RD-approved vitamin C supplements of 2026. From gummies to liposomal formulas, find the ...