Let Them Eat Beef: Effects of Lean Beef Consumption on Markers of Metabolic Syndrome

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Statement of Objective: To determine the effects of a diet that provides 30% energy from protein with ½ as lean, red meat on risk factors of metabolic syndrome in humans.
Design, Setting, and Participants: A 3-month, randomized, control, intervention trial with 33 participants (Beef-Intervention n=18; DASH-Control n=15) with markers of metabolic syndrome. Registered Dietitians Nutritionists recruited and educated participants on BeefIntervention Lean Beef Pattern, (30% of energy from protein with ½ as lean red meat, 40% carbohydrate, 30% fat) or DASH-Control dietary pattern, (15% of energy from protein, 55% carbohydrate, and 30 % fat). Of the 33 participants who completed the study; 21 were female and 12 male.
Outcome Measures and Analysis: Bodyweight (BW), fasting serum lipoproteins [total cholesterol (TC), LDL-cholesterol (LDL-C), HDL-cholesterol (HDL-C), and triglycerides (TG)], hemoglobin A1C (HbA1C), dietary satisfaction, and general health status were assessed at baseline and post intervention. A three-day diet journal was collected to assess for calorie and macronutrient intake at baseline and post-intervention. Repeated measures analysis was used to determine group differences from baseline to post-intervention and for interactions. Variables were checked for normality, and non-normal variables were transformed prior to analysis. Statistical significance was set at p ≤ 0.05.
Results: There were no significant changes in total cholesterol, LDL-C, and HDL-C. There was a significant time by group interaction effect for TG (baseline to post; Beef-Intervention 207±87mg/dL to 148±53; DASH-Control, 200±88 to 193±96.) Both groups had decreased BW and HgA1c from baseline to post. Those assigned to Beef-Intervention demonstrated compliance.
Conclusion and Implications: Lipid parameters, BW, and HbA1C of participants with metabolic syndrome randomized to the Beef-Intervention promoting 30% energy from protein with ½ as lean, red meat had outcomes that were similar or improved to those randomized to DASH-Control diet. The implication is, although larger studies in greater numbers still need to be done, that the inclusion of LRM in calorie-reduced diets may be used short term as an alternative to the DASH diet for those with MetS for weight and TG reduction.

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Functional Foods in Health and Disease





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