RESUMEN
<b>Objective</b>: To show the preventive effect of dietary supplements on metabolic syndrome.<br> <b>Methods</b>: Twenty dietary supplements were examined for inhibition of α-glucosidase, absorption of sugar in mice, lipids accumulation and adiponectin production in rat visceral adipocytes.<br> <b>Results</b>: In twenty dietary supplements, Bombyx mori and mulberry leaves inhibited rat intestinal α-glucosidase more than acarbose, and inhibited absorption of sugar in mice. In visceral adipocytes, <i>Ganoderma lucidum</i>, mate and Japanese yew inhibited accumulation of lipid and Artemisia Capillaris Flowers and Ground-ivy increased production of adiponectin in rat visceral adipocytes.<br> <b>Conclusion</b>: Mulberry leaves, Bombyx mori, <i>Glechoma hederacea</i>, Artemisia Capillaris Flowers are natural products which offer promise in the prevention of diabetes and metabolic syndrome. Incorporating dietary supplements into a treatment plan with medicines with similar effects requires further study.<br>