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

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

Too much vitamin D can harm your health. Know the warning signs, side effects, and safe ways to manage your vitamin D levels ...

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

Vitamin C toxicity is rare, but daily doses over 2,000 milligrams may cause unpleasant side effects like digestive issues, headache, and skin flushing.

What are the benefits of multivitamins, and what side effects do they have? In the world of vitamin supplements, finding products you know are safe can be difficult. Unlike drugs, dietary supplements ...

Learn which supplement is best for preventing and treating respiratory viruses, how to take them, and side effects to watch ...

Amelia Ti is a Registered Dietitian (RD) and Certified Diabetes Care and Education Specialist (CDCES) based in NYC. She completed her Bachelor's in Nutrition & Dietetics at NYU and Master's in Applied ...

As pollution and fluctuating temperatures continue to challenge our immune systems, the common cold remains one of the most ...

Vitamins are nutrients that are found in the foods we eat. They’re needed for functions such as growth, metabolism, and nervous system activities. Share on Pinterest Anna Denisova/Getty Images Often, ...