Tips for particularly effective diets that promise rapid weight loss without the yo-yo effect can be found everywhere. But which diet is really effective? We have checked the studies for you.
Low-fat and low-carb diets are particularly well known. Both diets involve cutting out one nutrient in particular, either fats or carbohydrates. This is supposed to result in weight loss.
In a meta-analysis from 2014, Bazzano et al. came to the conclusion that a low-carb diet is significantly more effective than a low-fat diet in terms of weight loss, fat mass and cholesterol levels. The study was conducted with overweight adults over a period of 12 months. Overall, the low-fat group lost just under two kilograms, while the low-carb group lost a good five kilograms. For some factors, such as blood pressure, there were no significant differences between the groups at the end of the study period. However, another meta-analysis from 2015 found no significant differences in terms of weight changes between low-fat and low-carb diets. And a 2018 study with over 600 test subjects also found no significant differences between the two diets after 12 months. The study situation is therefore inconclusive for these two types of diet, but it does suggest that the type of diet chosen is not decisive.