Lose Weight Successfully With High Protein, Low Glycemic Foods

Diets come and go through the years, each of them generally suggesting a specific amount of macronutrients.  These include low carb diets, low fat diets, high protein diets, and more.  While each of these diets have been reported to support weight loss in the short term, most of us find it difficult to maintain our weight loss for longer than 1 year.  Therefore, the overall success of many of these diets, particularly in comparison to each other, is often debated.

The Diogenes Study, a large, multicentered, pan-European weight loss study, has attempted to determine which type of diet is best in regards to successfully maintaining weight loss.  For this study, 773 adult men and women who successfully completed an 8-week weight loss phase were randomly assigned to one of five weight maintenance diets:

1. Low protein (13%) + low glycemic index
2. Low protein + high glycemic index
3. High protein (25%) + low glycemic index
4. High protein + high glycemic index
5. Control diet that followed each country's dietary guidelines

Each diet was moderate in fat content (25-30%) and study volunteers were directed to eat as much as they wanted while aiming to maintain their current body weight during the 26-week weight maintenance phase.  The results of this weight loss study, which were recently published online ahead of print in the New England Journal of Medicine, showed that:

• The high protein, low glycemic index diet was easier to stick to than the low protein, high glycemic index diet.
• Consumption of the low protein, high glycemic index diet resulted in a significant increase in body weight by about 3 - 4 pounds on average.  Weight re-gain was not observed on average in the other diet groups.
• Diet groups high in protein, regardless of glycemic index status, re-gained 2 lbs less than diet groups low in protein.
• Use of low glycemic index diet plans, regardless of protein level, resulted in about 2 lbs less weight re-gain than diets with a high glycemic index.
• The high protein groups and the low glycemic index groups were more likely to continue losing weight compared to the low protein and high glycemic index groups.  This was particularly true for the high protein, low glycemic index group.

This is an excellent study that shows us what might be the most effective way at maintaining weight loss for the long-term.  In this new weight maintenance study, a small increase in dietary protein intake and a small reduction in the glycemic index of foods consumed were of substantial help in either continuing modest weight loss or maintaining the weight volunteers lost in the weight loss phase of the study.  This study was also conducted in the children of the adult volunteers.  The childhood arm of the study reported similar benefits with the high protein, low glycemic index group showing a substantial decrease in the percent of overweight/obese children.  In contrast, children consuming the low protein, high glycemic index diet showed an increase in body fat.

The benefits of increasing dietary protein and decreasing the glycemic index are likely due to their effects on appetite and blood sugar metabolism.  Protein has been reported to increase our feelings of fullness and help maintain that feeling longer.  Foods with a low glycemic index have been shown to have little impact on blood sugar, helping us to avoid cravings and spikes in hunger.  These aspects of protein and low glycemic foods might be why individuals found it easier to stay on the high protein, low glycemic index diet plan compared to the other diet plans.

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