If you can find a way to build-in portion control, you can lose weight. 2 Diet Bars (150 calories per bar, at least 15 grams of protein) twice a day works. 2 Formula (100 calories per drink, at least 15 grams of protein) twice a day works. 2 Diet Jello (80 calories per serving, at least 15 grams of protein) twice a day works. 2 fast food quarter pound burgers (450 calories, no bun) twice a day works. 2 fast food grilled chicken breasts (300 calories, no bun) twice a day works. 2 fast food fish patties (300 calories, no bun) twice a day works.