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Abstract
Substitution of butterfat with tree nuts in meals may provide metabolic protection, although responses among males and females is unknown. Our objective was to determine postprandial responses in triglycerides, glycaemia, appetite, and antioxidant capacity from a high saturated fat (SFA) meal containing butter vs. partial substitution of butter for pecans (28g) in adult males (n=10) and females (n=12). This was a double-blind, randomized control trial with two testing visits involving consumption of the control (high SFA) vs. pecan meal. Blood draws, and a visual analog scale for appetite, were taken at fasting and intermittently for 3h postprandially. Triglycerides (p=0.02) and lipid peroxidation (p=0.02) were suppressed more, and antioxidant capacity increased more (p=0.05), for pecan vs. control in males, but not females. Conversely, females, showed improved satiety ratings (p<0.05) following the control vs. pecan meal. Partial substitution of butter with pecans in a breakfast meal positively affected several health-related biomarkers in males.