Nutrition basics
Learning Center
Video: HSG test for female infertility
Video animation shows the HSG test — an X-ray study to identify causes of female infertility.
Placenta: How it works, what's normal
Understand how this pregnancy organ works and what conditions can affect it.
Lack of sleep: Can it make you sick?
Lack of sleep can affect your immune system. Here's what you need to know.
What is thirdhand smoke, and why is it a concern?
Tobacco smoke creates toxic residue that clings to walls, carpets, clothes and other surfaces.
Tinnitus causes: Could my antidepressant be the culprit?
Ringing in the ears, also known as tinnitus, has many possible causes, such as taking antidepressants.
Diet soda: How much is too much?
Diet soda may help you cut calories, but other low-calorie options abound.
Rheumatoid arthritis: Can it affect the eyes?
Although rheumatoid arthritis is primarily a joint disease, it occasionally affects the eyes.
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.
Caffeine: Is it dehydrating or not?
Caffeinated drinks usually won't dehydrate you, but water is still your best option.
Juicing: What are the health benefits?
Learn about the pros and cons of extracting the juice from fresh fruits and vegetables.
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