Nutritional supplements
Learning Center
Birthmarks
Learn to identify types of birthmarks by how the skin looks. Examples include café au lait spot, congenital nevus, port-wine stain and hemangioma.
Birthmarks
Learn to identify types of birthmarks by how the skin looks. Examples include café au lait spot, congenital nevus, port-wine stain and hemangioma.
Male infertility
Male infertility often plays a role when couples have trouble conceiving. Find out what causes male infertility and available options for treatment.
Varicocele
Find out how this condition involving the enlargement of veins in the scrotum can affect sperm quality and production.
Active surveillance for prostate cancer
Learn about why doctors may recommend active surveillance for prostate cancer and what to expect.
Dry orgasm
It's possible for men to reach sexual climax without ejaculating. Learn about the possible causes.
Bent penis
Learn what can cause a curved erection and when you may need to see a health care provider.
Vitamin D deficiency
What are the risks of too little vitamin D?
Enlarged prostate: Does diet play a role?
Lifestyle factors such as diet appear to play a role in benign prostatic hyperplasia (BPH). See what lifestyle changes may help with symptoms.
Healthy sperm: Improving your fertility
You can take simple steps to have healthy sperm and improve your fertility.
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