A Paleolithic diet of meat, fruit, and vegetables led to weight loss in participants over two weeks due to increased satiety.

“There's a great study with a Paleolithic diet of meat fruit and vegetables which illustrates this clearly in this study participants were fed this diet for two weeks and despite the researchers efforts to keep the study participants weight stable those eating a Paleolithic diet lost weight without even being forced to they just had more satiety when they ate meat and fruit and vegetables they lost weight and the researchers weren't even trying to have them lose weight”