There was no effect on waist circumference , high-density lipoprotein cholesterol or blood pressure with the direction of effect favouring tree nuts for waist circumference .
Pooled analyses show a MetS benefit of tree nuts through modest decreases in triglycerides and fasting blood glucose with no adverse effects on other criteria across nut types .
OBJECTIVE To provide a broader evidence summary to inform dietary guidelines of the effect of tree nuts on criteria of the metabolic syndrome ( MetS ) .
Serum lipid effects of a high-monounsaturated fat diet based on macadamia nuts.
BACKGROUND Recent studies have identified potential beneficial effects of eating nuts , most of which have substantial amounts of monounsaturated fats . Macadamia nuts are 75 % fat by weight , 80 % of which is monounsaturated . OBJECTIVE To examine variations in serum lipid levels in response to a high-monounsaturated fat diet based on macadamia nuts . METHODS A r and omized crossover trial of three 30-day diets was conducted in 30 volunteers aged 18 to 53 years from a free-living population . Each was fed a " typical American " diet high in saturated fat ( 37 % energy from fat ) ; an American Heart Association Step 1 diet ( 30 % energy from fat ) ; and a macadamia nut-based monounsaturated fat diet ( 37 % energy from fat ) in r and om order . Serum total cholesterol , high-density lipoprotein cholesterol , and triglyceride levels were measured . RESULTS Mean total cholesterol level after the typical American diet was 5.20 mmol/L ( 201 mg/dL ) . After the Step 1 diet and the macadamia nut diet , total cholesterol level was 4.99 mmol/L ( 193 mg/dL ) and 4.95 mmol/L ( 191 mg/dL ) , respectively . Low-density lipoprotein cholesterol level was 3.37 mmol/L ( 130 mg/dL ) ( typical diet ) , 3.21 mmol/L ( 124 mg/dL ) ( Step 1 diet ) , and 3.22 mmol/L ( 125 mg/dL ) ( macadamia nut diet ) . High-density lipoprotein cholesterol level was 1.43 mmol/L ( 55 mg/dL ) ( typical ) , 1.34 mmol/L ( 52 mg/dL ) ( Step 1 ) , and 1.37 mmol/L ( 53 mg/dL ) ( macadamia nut ) . Lipid values after the Step 1 and macadamia nut diets were significantly different from those after the typical diet ( P<.05 ) . CONCLUSIONS The macadamia nut-based diet high in monounsaturated fat and the moderately low-fat diet both had potentially beneficial effects on cholesterol and low-density lipoprotein cholesterol levels when compared with a typical American diet
There was no effect on waist circumference , high-density lipoprotein cholesterol or blood pressure with the direction of effect favouring tree nuts for waist circumference .
Pooled analyses show a MetS benefit of tree nuts through modest decreases in triglycerides and fasting blood glucose with no adverse effects on other criteria across nut types .
OBJECTIVE To provide a broader evidence summary to inform dietary guidelines of the effect of tree nuts on criteria of the metabolic syndrome ( MetS ) .