Effect of dietary composition of weight loss diets on high-sensitivity c-reactive protein: the Randomized POUNDS LOST trial

Jacinda M Nicklas, Frank M Sacks, Steven R Smith, Meryl S LeBoff, Jennifer C Rood, George A Bray, Paul M Ridker, Jacinda M Nicklas, Frank M Sacks, Steven R Smith, Meryl S LeBoff, Jennifer C Rood, George A Bray, Paul M Ridker

Abstract

Objective: Overweight and obesity are associated with increased high-sensitivity C-reactive protein (hsCRP) levels. The purpose of this study was to determine if weight loss diets differing in fat, protein, or carbohydrate composition differentially reduce hsCRP.

Design and methods: POUNDS (preventing overweight using novel dietary strategies) LOST was a 2-year trial of overweight and obese adults randomly allocated to one of four weight loss diets with targeted percentages of energy derived from fat, protein, and carbohydrates (20, 15, 65%; 20, 25, 55%; 40, 15, 45%; 40, 25, 35%, respectively). hsCRP was measured at baseline, 6, and 24 months among 710 participants, and adiposity as measured by dual X-ray absorptiometry (N = 340) or abdominal computed tomography (N = 126) was correlated with hsCRP change.

Results: At 6 months, hsCRP was reduced in all trial participants by -24.7% (Interquartile range (IQR) +7%, -50%), weight by -6.7% (IQR -3%, -11%), and waist circumference by -6.0% (IQR -3%, -10%) (all P < 0.002), with no significant differences according to dietary composition. The percent change in hsCRP at 6 and 24 months correlated modestly with change in weight, waist circumference, fasting insulin, fasting glucose, HOMA, and most lipid levels. Reductions in hsCRP persisted despite ∼ 50% regain of weight by 24 months. The percent change in hsCRP at 24 months significantly correlated with changes in total body fat (r = 0.42), total abdominal adiposity (r = 0.52), subcutaneous abdominal adiposity (r = 0.52), visceral adiposity (r = 0.47), and hepatic tissue density (r = -0.34) (all P < 0.0006).

Conclusion: Weight loss decreased hsCRP by similar magnitude, irrespective of dietary composition. Clinicians concerned about inflammation and cardiovascular risk should recommend weight loss diets most likely to succeed for their patients.

Trial registration: ClinicalTrials.gov NCT00072995.

Copyright © 2013 The Obesity Society.

Figures

Figure 1
Figure 1
The median percent change from baseline at 6 months (light gray bars) and 24 months (dark gray bars) among all participants for weight, BMI, waist circumference, total cholesterol, low-density lipoprotein, high-density lipoprotein, triglycerides, fasting glucose, fasting insulin, HOMA, HbA1c, and hsCRP. The dot represents the medians, and the bars show the range from the 25th to the 75th percentile.

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Source: PubMed

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