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ISLAMABAD: Eating nuts reduces low-density lipoprotein (LDL) cholesterol and improves the blood lipids profile, suggests an analysis of 25 trials.
Nuts are a matrix of healthy nutrients, and the most obvious reason for the cholesterol-lowering effect is their unsaturated fat content, Health News reported.
Nuts also contain fiber, vegetable protein, phytoesterols and other antioxidants.
Studies have consistently associated the nut consumption with reduced risk for coronary heart disease.
Subsequently, many dietary intervention trials investigated the effects of nut consumption on blood lipid levels.
To estimate the effects of nut consumption on blood lipid levels and to examine whether different factors modify the effects, researchers from California pooled data on 583 men and women who had participated in 25 nut consumption trials conducted in seven different countries.
The participants had normal lipid profiles and were not taking any lipid-lowering medications when the trials started.
It was found that eating about 2.3 ounces of nuts a day - a third of cupful reduced total cholesterol levels by 5 per cent and bad LDL cholesterol by 7.5 per cent.
That amount of nut eating also improved the ratio of LDL cholesterol to good HDL cholesterol by 8.5 per cent and caused a decrease of 10 per cent in triglyceride levels among people with high levels of those blood fats.
The benefits from eating nuts were found to be the greatest among thin people, those with high LDL cholesterol and those consuming a fat-rich diet.
Also, the type of nuts eaten didn't seem to matter.
The benefits were same for walnuts, almonds, peanuts, pecans, hazelnuts, macadamias and pistachios.
Despite the protective effects of nuts, the researchers warned against over-consumption of nuts as they are highly caloric and thus can contribute to obesity.
A 3-ounce-a-day limit was recommended.
