These are foods doctors, scientists, medical researchers and nutritionists know help weight loss. Here s what I mean: In a recent California study, doctors discovered that eating half a grapefruit before meals helped patients reduce their insulin levels for 2 hours after eating. The patients who ate the grapefruit before meals lost 1.6kg on average, compared to 0.3kg lost by the patients who were not given the grapefruit, making grapefruit 433% more effective at burning fat compared with dieting alone. Scientists gave one groups of overweight women a whole-wheat protein to eat, and compared results with another group following a standard low calorie diet. The group who ate the wheat protein lost an average of 5.5kgs during the experiment, while the group who ...