Dietary Protein Helps Keep the Weight Off After Weight Loss
09 May 2009
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Coordinator of the EC-funded Diogenes diet and weight regain prevention study Professor Arne Astrup says, "Taking all 8 centers together and the results from 548 adults, we are able to see that those subjects randomized to the higher protein diet after weight loss were able to maintain that weight loss most successfully. Some subjects randomized to the lower glycemic index (GI) diet also had some success with weight maintenance but it was less marked than those on the higher protein diet.”
548 adult subjects completed the study with clinical measurements taken on three different occasions: before the weight loss period (when at least 8% of initial bodyweight had to be lost); end of weight loss and prior to dietary intervention period, and end of 6 month intervention period.
The aim for the diets was a difference in protein intake of > 10 energy% and in GI of > 10 units. Two centers provided subjects with all foods for free using a shop system and 6 centers provided dietary instruction only to subjects. Subjects also undertook tests that have fed into other aspects of the Diogenes study.
Professor Astrup says: "This study confirms the view that the diet chosen after weight loss does help with weight maintenance, contrary to other recently released studies which concluded that diet makes no difference to weight maintenance after weight loss. We can have confidence in our findings and conclusions as each subject was closely monitored during the study and there was a much lower drop-out rate in the high protein group, possibly due to successful weight management during the study period."
All subjects on the higher protein diet whether they took part in the 'shop system' or 'instruction only' models had equal success.
Professor Astrup concluded: "For consumers, the good news is that successful outcomes for weight management with the higher protein diet have been achieved with relatively minor changes in diet composition. Most families would be able to make these dietary changes and help safeguard their health through better weight management."
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References:
1. Arne Astrup, et al. The Diogenes Project – Diet, Obesity & Genes.
