Nutritional supplements
Learning Center
Retrograde ejaculation
Learn about the symptoms and treatment options for this condition that can cause male infertility.
Age spots (liver spots)
Learn more about the harmless dark spots on your skin that tend to appear as you age, especially in areas exposed to the sun. Treatment is available.
Pomegranate juice: A cure for prostate cancer?
Early research suggested that pomegranate juice could slow the growth of prostate cancer, but more-rigorous trials failed to confirm those results.
Male hypogonadism
This condition affects the ability of men's bodies to produce enough testosterone or enough sperm or both.
Spermatocele
Learn more about this noncancerous testicular disorder that may require surgery if it's causing discomfort. But, the condition often needs no treatment.
Too much vitamin C: Is it harmful?
Vitamin C is an essential nutrient, but too much carries its own risks.
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?
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Calcium supplements: When should they be taken?
Timing matters when taking these supplements. Learn how to take them.
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?
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