Among dietary factors soy products are reported to have a beneficial role in the management of the metabolic syndrome.5 Previous studies have reported a reduction in plasma inflammatory markers,6 malondealdehyde7 and also improvement in some features of this condition by the use of soy products.8 There are different probable action mechanisms for beneficial effects of soy components.5 One hypothesis might be related to the serum leptin levels. Here, LEP is linked to metabolic syndrome.