What Does Citrus Bergamot Do? Jarrow Formulas provides clinically documented Citrus Bergamot (Citrus bergamia) extract for natural support for healthy cholesterol levels and blood glucose metabolism. Citrus bergamia grows along the Ionic coast of Southern Calabria, Italy. It contains natural polyphenolic antioxidants, or free radical scavengers, that have been found to influence cholesterol and blood glucose levels.