The newest supplement-related internet trend now involves taking vitamin D and magnesium supplements at the same time.

Major study finds specific combination of vitamin D, omega-3s and strength training reduces biological age and slashes cancer ...

Vitamin B6 can also influence serotonin and dopamine levels, which can impact your sleep if taken too late, Keatley says.

Tina Tan, MD, of Northwestern University, who is president of the Infectious Diseases Society of America, said vitamin A "really plays an important role in maintaining a healthy immune system and ...