Medically reviewed by Jonathan Purtell, RDN Key Takeaways Vitamin C may be most beneficial when taken two to three times ...

Vitamin C may help shorten how long cold symptoms last and their severity when used before cold symptoms start, but not after a cold begins.

Find out how vitamin C and vitamin D function in your body, their role in immune defense, and how much you may need for optimal support.

Vitamin C is vital to immune function and the maintenance of bone, skin, teeth, and joints. Learn more about its wide range of health benefits.

High doses of vitamin C could be a new breakthrough in treating cancer. The University of Iowa Health Care Carver College of Medicine has shared results from a randomized, phase 2 trial testing the ...

A randomized, phase 2 clinical trial shows that adding high-dose, intravenous (IV) vitamin C to chemotherapy doubles the overall survival of patients with late-stage metastatic pancreatic cancer from ...