L-Arginine, Vascular Response and Mechanisms

L-Arginine, Vascular Response and Mechanisms

The purpose of the study is to employ the supplement L-arginine to test the hypothesis that activation of blood flow to the brain during cognitive tasks is regulated by nitric oxide in older subjects with diabetes mellitus and/or hypertension (high blood pressure).

Inclusion Criteria:

• diabetes and/or hypertension

Exclusion Criteria:

• alzheimers disease, dementia, stroke, active herpes, recent angina or heart attack