Vitamin B12 is typically well-tolerated, but in very rare cases, there are serious side effects to be aware of. Learn more ...

Potential side effects caused by the popular exercise supplement creatine include weight gain, nausea, diarrhea, muscle ...

Magnesium glycinate can cause mild digestive side effects like diarrhea, gas, and bloating, but these tend to be gentler ...

What happens if your body has too much vitamin B12? Read on to find out the dangerous side effects of having excessive levels ...

Many people use zinc supplements to boost immunity or improve acne symptoms. Learn how much zinc is safe for you, and what to watch for if you use it long term.

Supplements can support your health—but some carry serious risks. Reviewed by Dietitian Maria Laura Haddad-Garcia Supplements can cause heart, liver, kidney and digestive side effects. "Natural" doesn ...

Androstenedione is one of those supplements that was peddled to athletes for years as a quick path to bulging muscles and high testosterone levels, but it comes with some serious side effects. Also ...

MiraLAX (polyethylene glycol 3350) is a brand-name powder that’s mixed into a beverage and taken by mouth. It’s available over the counter and can be used for constipation or before a colonoscopy as a ...

If you're considering a vitamin B12 supplement because of certain dietary restrictions, medical conditions or your age, this ...

Research shows many benefits in the use of creatine supplements in women. Experts explain how to use creatine, what creatine ...

Supplements are not regulated by the Food and Drug Administration the same way that medications are. As a result, there is ...