Cognitive, Emotional, Physical and Psychosocial Effects of Panax Quinquefolius L

Inclusion Criteria: * Healthy men and women between the age of 35 - 75 * Women of child bearing capacity who agree to use an acceptable form of birth control during the trial (i.e. oral contraception, reliable use of a double-barrier method (e.g. condom and diaphragm, condom and foam, condom and sponge), IUD or tubal ligation) * Achievement Test (WRAT-III) score greater than 70 with a reading level within normal limits as defined by a Wide Range * Willing to adhere to the requirements of the protocol, including availability for follow-up visits * Willing and able to sign written informed consent Exclusion Criteria: * Medical conditions; * HIV/AIDS * Malignancy (under active observation or treatment) * Unstable cardiovascular disease (physician visit or hospitalization for unstable cardiovascular disease in the last 6 mo.) * Renal Abnormalities (serum creatinine known to be \> 200umol/L) * Acute or active chronic liver disease * Diabetes * Neurologic or psychiatric disease (progressive or currently under treatment) * Active tuberculosis * Multiple sclerosis * Bleeding disorders