Nutritional supplements
Learning Center
Passive-aggressive behavior: What are the red flags?
Learn about the signs of this indirect way of expressing negative feelings.
Penis fracture: Is it possible?
Know the symptoms of this health concern.
Poppy seed tea: Beneficial or dangerous?
Poppy seed tea may be used as a natural pain reliever. The key is the opioids in the seed coating, which may be dangerous.
Premenstrual dysphoric disorder: Different from PMS?
Extreme moodiness, intense sadness or marked irritability in the days before your period — along with your usual PMS symptoms — could be PMDD.
Prenatal vitamins: OK for women who aren't pregnant?
Prenatal vitamins: Why they might not be suitable if you're not pregnant.
Probiotics and prebiotics: What you should know
Probiotics are foods or supplements that contain 'good' bacteria that might help treat or prevent illness. Should they be part of your diet?
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.
Prostate cancer: Does PSA level affect prognosis?
Find out what your PSA level may mean for your prostate cancer prognosis.
Prostatitis: Can sexual activity make it worse?
Some men with prostatitis have pain with ejaculation or sexual activity.
Reactive hypoglycemia: What can I do?
Reactive hypoglycemia is low blood sugar that happens after eating.
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