Nutrition basics
Learning Center
Sodium nitrate in meat: Heart disease risk factor?
Sodium nitrate, a preservative in some meats, may increase your heart disease risk.
Sperm: How long do they live after ejaculation?
After ejaculation, the life span of sperm depends on the circumstances.
Stomach flu: How long am I contagious?
Depending on which virus causes your stomach ailment, you can be contagious from a few days to two weeks or more.
Tanning beds: Safer than the sun?
Tanning beds don't offer a safe alternative to natural sunlight.
Taurine in energy drinks: What is it?
Energy drink ingredients can cause concern for some who consume these beverages.
Testosterone therapy in women: Does it boost sex drive?
This type of hormonal therapy may boost sex drive for some women, but its long-term safety is unclear.
Tetanus shots: Is it risky to receive 'extra' boosters?
For adults, tetanus shots are recommended every 10 years.
Thin skin? Added protection helps
Fragile or thin skin is a fairly common problem, especially in older adults.
Thyroid guard: Do I need one during a mammogram?
A Mayo Clinic expert discusses using thyroid guards during mammograms to reduce the risk of thyroid cancer from radiation.
Underweight? See how to add pounds healthfully
If you're underweight and not happy about it, try these tips to help you achieve your goal weight.
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