The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
1/90000 - 1/360000.
Dehydroepiandrosterone (DHEA) is a major secretory product of the human adrenal cortex during intrauterine development as well as during adulthood. DHEA circulates in the bloodstream as DHEA-sulfate (DHEAS). DHEA has been implicated in a wide range of physiological roles including aging, immunology, learning and memory and obesity.