Let Them Eat Beef: Effects of Lean Beef Consumption on Markers of Metabolic Syndrome
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.
Functional Foods in Health and Disease
DOI of Published Version
Olson, Kristin Leigh; Russell, Mary Beth; Rami, Kelsey; and Kattelmann, Kendra K., "Let Them Eat Beef: Effects of Lean Beef Consumption on Markers of Metabolic Syndrome" (2016). Health and Nutritional Sciences Faculty Publications. 181.