Aims: The current study aims to investigate practicability and effects of a combined dietary intervention with increased relative protein content supplemented with omega-3 polyunsaturated fatty acids (PUFA) on metabolic control and inflammatory parameters in a real life situation in type 2 diabetes patients.
Methods: In this observational study we advised thirty mostly obese patients with type 2 diabetes to follow a protein-enriched diet with carbohydrates of low glycemic index (low GI) and moderate fat reduction supplemented with omega-3 PUFA for 24 weeks. Primary efficacy parameter was the change in HbA1c; secondary parameters included changes in systemic inflammation (measured by ultrasensitive C-reactive protein, usCRP), body weight, waist circumference, fat mass. The study is registered at clinicaltrials.gov (NCT01474603).
Results: The dietary intervention significantly reduced the primary efficacy variable HbA1c from a baseline value of 63±11mmol/mol to 59±14mmol/mol (P=0.033) and 56±12mmol/mol (P=0.001) after 12 and 24 weeks, respectively. In addition, usCRP decreased significantly at 24 weeks (P=0.039). Waist circumference, an important indicator for cardiometabolic-risk and silent inflammation, decreased from baseline 116.0±14.1cm to 114.9±13.5cm (P=0.019), 114.0±14.4cm (P=0.001), and 112.7±13.4cm (P=0.049), after 3, 12 and 24 weeks, respectively.
Conclusion: Counseling a protein enriched and low glycemic index diet supplemented with long-chain omega-3 PUFA in a real-life clinical setting improves glycemic control and also reduces waist circumference and silent inflammation in overweight or obese patients with type 2 diabetes.
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