Nutritional supplements
Learning Center
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Vitamin D deficiency: Can it cause high blood pressure?
Too little vitamin D is bad for the bones, but what about the heart? Learn how a low vitamin D level may affect blood pressure.
Vitamin D deficiency
What are the risks of too little vitamin D?
Vitamin C: An essential nutrient
Vitamin C is a water-soluble vitamin that supports normal growth and development and helps your body absorb iron. Because your body doesn't produce or store vitamin C, it's important to include vitamin C in your diet. For most people, an orange or a cup of strawberries, chopped red pepper, or broccoli provides enough vitamin C for the day.
Virtual colonoscopy
Unlike other colon cancer screening tests, this imaging test doesn't use a scope to examine your colon. Learn how it works and what to expect.
Video: Uterine fibroids treatment — Focused ultrasound
Uterine fibroids treatment with MRI and ultrasound — Relief is possible without surgery or drugs.
Video: Using a metered dose asthma inhaler and spacer
Watch this video to see how to use a metered dose asthma inhaler and spacer.
Video: The epidural block
Understand this anesthesia for labor and birth.
Video: Ovulation
Ovulation — the release of an egg from an ovary — occurs about midway through the menstrual cycle. See how it happens.
Video: Mammogram for breast cancer — What to expect
Watch video to see what it's like to have a mammogram, or breast cancer detection exam.
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