Nutrition basics
Learning Center
Video: Colonoscopy
See what a doctor sees when you undergo an examination of your colon.
Diarrhea
Diarrhea: Symptom — Overview covers definition, causes of acute and chronic diarrhea.
Dietary fiber: Essential for a healthy diet
Some of the health benefits of eating dietary fiber might surprise you. Find out what fiber can do for you and how to get more in your diet.
Water: How much should you drink every day?
Know how much water to drink to stay healthy and hydrated.
Glucose challenge test
Know how to prepare for this gestational diabetes screening test.
A1C test
Learn more about the preparation for and results of this common diabetes blood test.
Rheumatoid factor
Rheumatoid factor — This blood test can help diagnose autoimmune disorders such as rheumatoid arthritis, Sjogren syndrome and lupus.
Complete blood count (CBC)
Learn what to expect from having this common blood test, why it's done and how to prepare.
Sodium: How to tame your salt habit
Find out which foods have lots of this mineral and get tips on how to cut back.
Dietary fat: Know which to choose
Not all fat is created equal. Find out which type of fat to choose — and which to avoid — for good health.
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