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Learning Center
Discolored semen: What does it mean?
Find out what causes discolored semen.
Digestion: How long does it take?
Digestion takes about two to five days, depending on your system.
Dietary supplements for erectile dysfunction: A natural treatment for ED?
Some dietary supplements for erectile dysfunction might work and some might be dangerous. Get the facts.
Did the definition of Alzheimer's disease change?
What the change in the research definition of Alzheimer's disease means for you.
Demyelinating disease: What can you do about it?
Learn the causes and types of these diseases that affect the protective covering of nerves, which include multiple sclerosis. Also learn how they're treated.
Delusional parasitosis
Learn more about this condition and positive steps you can take to manage the symptoms.
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
Degenerative changes in the spine: Is this arthritis?
Degenerative changes in the spine visible on X-rays indicate osteoarthritis of the spine.
Cuts of beef: A guide to the leanest selections
Whether you're watching your health or your weight, you can still enjoy this type of red meat once in a while. This guide points you to lean choices.
Cryotherapy for prostate cancer
Find out how very cold temperatures are used to freeze tissue and treat prostate cancer. Learn about the side effects and potential benefits of cryotherapy.