Nutritional supplements
Learning Center
Narrow stools: Should I be concerned?
Narrow stools may be a sign of narrowing or obstruction of the colon.
Multivitamins: Do young children need them?
Multivitamins: Are they good insurance for young children?
Multiple sclerosis
This nervous system disorder causes a range of symptoms — and while there's no cure, it's possible to have long periods of remission.
Mononucleosis and Epstein-Barr: What's the connection?
The Epstein-Barr virus sometimes causes a disease known as mono. Learn who is at risk and what the symptoms are.
Monoclonal gammopathy of undetermined significance (MGUS)
When bone marrow produces an unusual protein in the blood, it can sometimes lead to certain types of blood cancer.
Mold allergy
Coughing, sneezing and itchy eyes often accompany this common allergy. Find out how to treat this condition and help keep it under control.
Molar pregnancy
This rare pregnancy complication requires early treatment. Learn more about diagnosis and treatment of this type of pregnancy loss.
Migraines: Are they triggered by weather changes?
Migraines — Are they triggered by weather changes?
Medications and supplements that can raise your blood pressure
Certain medicines and herbal remedies, including those used to treat pain, depression and the common cold, can increase blood pressure.
Mayo Clinic Minute: Women and Alzheimer's Disease
Researchers are working to figure out why more women have Alzheimer's disease than men.
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