HEALTH TOPICS 
Platelet-rich plasma therapy
Harnessing the healing power of these blood cells is intriguing, but research is lacking.
Times have changed since the days of bloodletting, when doctors treated their patients by taking blood out of them. Now a procedure called platelet-rich plasma therapy has emerged that involves injecting a portion of the blood back into an ailing joint. You might say it's bloodletting in reverse.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise