Inhibitory Effects of Purple Sweet Potato Leaf Extract on the Proliferation and Lipogenesis of the 3T3-L1 Preadipocytes.

Purple sweet potato leaves (PSPLs) are healthy vegetable that is rich in anti-oxidants. A solution of boiling water extract of PSPL (PSPLE) is believed to be able to prevent obesity and metabolic syndrome in the countryside of Taiwan, but its efficacy has not yet been verified. The purpose of this study was to investigate the possible anti-adipogenesis effect of PSPLE in vitro.