Teen health
Learning Center
Undigested food in stool: What does it mean?
Undigested food in stool generally isn't a problem unless it's accompanied by other symptoms.
Universal blood donor type: Is there such a thing?
Type O negative is sometimes called the universal blood donor type.
Unusual COVID-19 symptoms: What are they?
COVID-19 can cause a wide variety of symptoms, some more common than others. Learn about how COVID-19 can make you feel.
VLDL cholesterol: Is it harmful?
Like LDL cholesterol, very-low-density lipoprotein (VLDL) cholesterol is considered a type of 'bad' cholesterol.
Vaccines during pregnancy: Are they safe?
Find out which vaccinations you need while pregnant and which ones to stay away from.
Vaginal dryness after menopause: How to treat it?
Low-dose estrogen therapy, vaginal moisturizers and vaginal lubricants are among treatments for this condition and the discomfort it causes.
Valerian: A safe and effective herbal sleep aid?
Valerian — Can this sleep aid help you sleep better?
Vaping during pregnancy: Is it safe?
Vaping during pregnancy can expose your baby to nicotine.
Vegetarian diet: Can it help me control my diabetes?
Although switching to a vegetarian diet won't cure diabetes, it may offer some benefits.
Viagra for women: Does it exist?
Learn about medicines to treat problems with sexual arousal or sexual desire in women.
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