R-Sulforaphane is a naturally-occurring isothiocyanate found in broccoli. This compound exhibits antioxidative, anticancer, and chemopreventive activities; research suggests that it may be more bioactive than the S-isomer. R-Sulforaphane increases expression of phase II enzymes such as glutathione-S-transferase and quinone reductase; it also increases activity and expression of glucuronosyl transferase and epoxide hydrolase. At low doses, R-sulforaphane promotes proliferation of stem cells and hematopoiesis. This compound also inhibits the aryl hydrocarbon receptor. Please note: This compound is a neat liquid at room temperature, clear to slightly yellow in color. It is not dissolved in solvent. In small quantities the material will coat the sides of the ampule it is shipped in and may appear to be invisible, or it may be trapped in the tip of the ampoule. Wash the upper and lower parts of the ampoule with solvent to ensure all of the material is obtained.