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This condition, often called stomach flu, is usually harmless, except for infants and people with…

Learn about the symptoms, treatment and prevention of these sometimes deadly diseases.

Unlike other colon cancer screening tests, this imaging test doesn't use a scope to examine…

Explore the uses of vitamin A and risks of excess use of this supplement.

Know the causes of a vitamin B-12 deficiency and when use of this supplement is…

Low levels of vitamin B-12 and other B vitamins may be linked to depression, but…

Vitamin B-12 injections — A weight-loss shot sounds appealing, but does it work?

Understand when a vitamin B-6 deficiency might occur and learn the risks of taking too…

Vitamin C is an essential nutrient found in foods and available as a supplement you…

Learn how this supplement affects bone health and other health conditions. And know the possible…

Some research suggests that vitamin D may reduce the risk of multiple sclerosis (MS).

What are the risks of not having enough of this vitamin?

Too little vitamin D is bad for the bones, but what about the heart? Learn…

A Mayo Clinic specialist explains why, when and how to give your baby vitamin D.

Understand the risks of taking high doses of this vitamin in supplement form.

A lack of folate and vitamin B-12 can cause red blood cells to become too…

Find out how this supplement might affect brain health and the possible risks of taking…

Certain vitamins and supplements may help manage MASLD, also called NAFLD or fatty liver disease.…

Can vitamin supplements improve MS symptoms?

Learn more about this condition in which your skin loses pigment cells, resulting in very…

Like LDL cholesterol, this cholesterol is considered a type of "bad" cholesterol.

Vocal cord dysfunction and asthma cause similar symptoms, but they're not the same. Find out…

Find out more about this condition that happens when nerve signals that control the voice…

Learn more about the causes of common voice disorders, such as laryngitis and granuloma, and…

Vomiting blood can be a symptom of a number of serious conditions. Find out what…

Learn more about the symptoms, causes, diagnosis and treatment of this inherited bleeding condition that…

Learn about this rare cancer that forms on the skin that surrounds the urethra and…

Vulvar varicosities can cause discomfort during pregnancy. Understand what causes this form of varicose veins…

Learn about pain, burning and irritation of the vaginal area that doesn’t have a clear…

Learn about this rare type of white blood cell cancer. Treatments include chemotherapy, targeted therapy,…