Does it work?

Probably not, but more evidence is needed. The results of some studies suggest ginseng may lower blood glucose and boost immune function, but most studies completed so far have been small or flawed in design and reporting. Only a handful of large clinical trials using ginseng have been completed.

NCCAM is supporting research studies to better understand:

• The use of ginseng.
• How ginseng interacts with other herbs and drugs and exploring its potential to treat chronic lung infection, impaired glucose tolerance, and Alzheimer's disease.