Dental care
Learning Center
Sensitive teeth: What treatments are available?
Know what causes sensitive teeth and effective treatments.
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Dental floss vs. water flosser: Which is better?
Cleaning between your teeth every day is an important part of good oral health.
Ocular migraine: When to seek help
Flashes of light, zigzagging patterns and temporary blindness — what does it all mean?
When to brush your teeth
When should you brush your teeth? Learn how to protect your oral health.
Macrocytosis: What causes it?
Enlarged red blood cells (macrocytosis) can be due to many factors.
VLDL cholesterol: Is it harmful?
Like LDL cholesterol, very-low-density lipoprotein (VLDL) cholesterol is considered a type of 'bad' cholesterol.
Digestion: How long does it take?
Digestion takes about two to five days, depending on your system.
Discolored semen: What does it mean?
Find out what causes discolored semen.
Lung nodules: Can they be cancerous?
Lung nodules are common. Most aren't cancer. Find out what tests might be recommended if you have a lung nodule.
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