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 ) .
Effect of a very-high-fiber vegetable, fruit, and nut diet on serum lipids and colonic function.
We tested the effects of feeding a diet very high in fiber from fruit and vegetables . The levels fed were those , which had originally inspired the dietary fiber hypothesis related to colon cancer and heart disease prevention and also may have been eaten early in human evolution . Ten healthy volunteers each took 3 metabolic diets of 2 weeks duration . The diets were : high-vegetable , fruit , and nut ( very-high-fiber , 55 g/1,000 kcal ) ; starch-based containing cereals and legumes ( early agricultural diet ) ; or low-fat ( contemporary therapeutic diet ) . All diets were intended to be weight-maintaining ( mean intake , 2,577 kcal/d ) . Compared with the starch-based and low-fat diets , the high-fiber vegetable diet result ed in the largest reduction in low-density lipoprotein ( LDL ) cholesterol ( 33 % + /- 4 % , P < .001 ) and the greatest fecal bile acid output ( 1.13 + /- 0.30 g/d , P = .002 ) , fecal bulk ( 906 + /- 130 g/d , P < .001 ) , and fecal short-chain fatty acid outputs ( 78 + /- 13 mmol/d , P < .001 ) . Nevertheless , due to the increase in fecal bulk , the actual concentrations of fecal bile acids were lowest on the vegetable diet ( 1.2 mg/g wet weight , P = .002 ) . Maximum lipid reductions occurred within 1 week . Urinary mevalonic acid excretion increased ( P = .036 ) on the high-vegetable diet reflecting large fecal steroid losses . We conclude that very high-vegetable fiber intakes reduce risk factors for cardiovascular disease and possibly colon cancer . Vegetable and fruit fibers therefore warrant further detailed investigation
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 ) .