Nutrition basics
Learning Center
Prostate cancer metastasis: Where does prostate cancer spread?
Prostate cancer can spread (metastasize) just about anywhere in the body, but it's most likely to spread to the lymph nodes and bones.
Phenylalanine in diet soda: Is it harmful?
You may be worried about phenylalanine because of a warning on diet soda. Find out why the warning is there.
Petroleum jelly: Safe for a dry nose?
Rarely, inhaling petroleum jelly for prolonged periods can cause lung inflammation (lipoid pneumonia).
Penis fracture: Is it possible?
Know the symptoms of this health concern.
PSA levels: Can they rise after partial prostate removal?
A number of factors can cause PSA levels to rise after surgery for an enlarged prostate.
Ozone air purifiers: Can they improve asthma symptoms?
Ozone air purifiers don't reduce asthma symptoms. In fact, they can make asthma worse.
Neti pot: Can it clear my nose?
Learn more about this container designed to rinse debris or mucus from the nasal cavity.
Monosodium glutamate (MSG): Is it harmful?
Monosodium glutamate (MSG) can trigger headaches and other symptoms in some people.
Melatonin side effects: What are the risks?
Melatonin is generally safe for short-term use but can cause side effects.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
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