Nutrition basics
Learning Center
Birth control pill FAQ: Benefits, risks and choices
The birth control pill is surrounded by misinformation. Get the facts on common concerns and questions about taking the pill.
Blocked tear duct
Watery, irritated eyes may occur when your tears can't drain normally. Learn about this common eye condition that affects newborns and sometimes, adults.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
Boost your calcium levels without dairy? Yes you can!
Which foods pack a healthy dose of calcium? There're plenty of options, even if you don't do dairy.
Breast implants and cancer: Any connection?
Concerned about a link between breast implants and cancer? Get the facts.
Broken collarbone
This common injury is usually the result of falling, playing sports or being in a traffic accident.
Bruxism (teeth grinding)
Bruxism is a condition in which you grind, gnash or clench your teeth unconsciously when you're awake or while you're sleeping.
Bullous pemphigoid
Learn about the symptoms, treatment and self-care strategies for this blistery skin condition that affects older adults.
COVID-19 antibody testing
Learn how COVID-19 antibody testing is done to find out if you've had a past infection with SARS-CoV-2, the virus that causes coronavirus disease 2019.
COVID-19 diagnostic testing
Find out how COVID-19 diagnostic testing is done to learn if you're currently infected with SARS-CoV-2, the virus that causes coronavirus disease 2019.
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