Hypocholesteremic and antioxidant effects of Withania somnifera (WS) Dunal (Solanaceae) were investigated in hypercholesteremic male albino rats. When the root powder of WS was added to the diet at 0.75 and 1.5 gm/rat/day, hypercholesteremic animals registered significant decreases in total lipids (-40.54%; -50.69%), cholesterol (-41.58%; -53.01%) and triglycerides (-31.25%; - 44.85%) in plasma. On the other hand, significant increases in plasma HDL-cholesterol levels (+15.10%; +17.71%), HMG-CoA reductase activity (+19.51%; +26.02%) and bile acid content (+24.64%; +30.52%) of liver were noted in these animals. A similar trend was also noted in bile acid (+22.43%;+28.52%), cholesterol (+14.21%; +17.68%) and neutral sterol (+12.40%; +18.85%) excretion in the hypercholesteremic animals with WS administration. Further, a significant decrease in lipid-peroxidation (-35.29%; -36.52%) occurred in WS administered hypercholesteremic animals when compared to their normal counterparts. However, it appeared that WS root powder is also effective in normal subjects for decreasing lipid profiles.
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