Nutritional supplements
Learning Center
Heart attack prevention: Should I avoid secondhand smoke?
It's possible that secondhand smoke can irritate the arteries and increase the risk of a heart attack.
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Dental floss vs. water flosser: Which is better?
Cleaning between your teeth every day is an important part of good oral health.
When to brush your teeth
When should you brush your teeth? Learn how to protect your oral health.
Tetanus shots: Is it risky to receive 'extra' boosters?
For adults, tetanus shots are recommended every 10 years.
Calcium supplements: When should they be taken?
Timing matters when taking these supplements. Learn how to take them.
Can vitamins help prevent a heart attack?
Study results are mixed on whether vitamins can prevent heart disease. Find out more.
Do the benefits of vitamin C include improved mood?
You know vitamin C helps fight the common cold. But did you know that vitamin C might also help improve your mood?
Multivitamins: Do young children need them?
Multivitamins: Are they good insurance for young children?
Fasting diet: Can it improve my heart health?
Periodically following a fasting diet may have heart-health benefits. Find out more.
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