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The hypocholesteremic activity of garlic was tested by incorporation freeze-dried garlic powder at 0.5, 1.0, 2.0 and 3.0% levels in an atherogenic diet fed to rats. It was observed that 0.5 and 1.0% levels were not effective whereas the other 2 levels were. The group fed 2.0% garlic powder had much lower serum cholesterol level than the one fed 3%. The increased levels of low density lipoproteins (LDL) and LDL-cholesterol in rats fed the atherogenic diet were partly reversed in rats receiving a supplement of 2% garlic powder. On a cholesterol-containing diet, high density lipoprotein (HDL) and HDL-cholesterol levels were decreased. Inclusion of garlic powder in the atherogenic diet enhanced the percentage of HDL whereas no change was observed in HDL cholesterol levels. Commercial garlic pearls (equivalent to 0.15% garlic powder in the diet) produced a significant decrease in serum and liver cholesterol levels in rats fed the atherogenic diet. On the other hand, asafoetida at 1.5% level failed to reduce the serum cholesterol levels in the cholesterol-fed rats.

SummaryPlatelet aggregation was measured using platelet rich plasma prepared from rats fed oryzanol in the control diet and those fed oryzanol in a 1 per cent cholesterol diet (HCD). Oryzanol with the control diet did not alter platelet aggregation induced by ADP and collagen. On the other hand, oryzanol fed along with HCD significantly inhibited platelet aggregation induced by ADP and totally inhibited aggregation induced by collagen.

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