Erectile Dysfunction

Erectile dysfunction, or ED, is the inability to achieve or maintain an erection suitable for sexual intercourse. It is estimated that ED affects up to 30 million men in the United States, including more than half of men between the ages of 40 and 70 years old.


Symptoms may include persistent:

  • Trouble getting an erection
  • Trouble keeping an erection
  • Reduced sexual desire


A successful erection is dependent on the following conditions:

  • Properly functioning nerves to the penis
  • Adequate blood circulation into the penis
  • The veins must be able to “trap and keep” the blood inside the penis
  • A stimulus from the brain

If something is interfering with any or all of these conditions, a full erection will not be achieved.

Causes of ED can be either physical or psychological in nature.

Psychological causes

  • Depression, anxiety or other mental health conditions
  • Stress
  • Relationship problems

Physical Causes

  • Heart disease
  • Diseases that affect blood flow, such as atherosclerosis or venous leakage
  • High cholesterol
  • High blood pressure
  • Diabetes
  • Obesity
  • Parkinson’s disease
  • Multiple sclerosis
  • Low testosterone
  • Peyronie’s disease (scar tissue in the penis)
  • Certain medicines
  • Tobacco use
  • Alcoholism and other forms of substance abuse
  • Prostate surgery or radiation treatment for prostate cancer
  • Surgeries or injuries that affect the pelvic area or spinal cord

Medical Research on Stem Cells for ED

Review clinical results on stem cell treatment for erectile dysfunction.

Stem Cells for Peyronie's Disease

Read promising effects of stem cell treatment on Peyronie's cases.