Any insulin pteevnrs fat burning. If i eat 1800 calories from sugary cereals, ice cream, and potatoes. versus eating 2000 calories from grass-fed wild game or whatever, you will have a surplus of 200 calories thus gain weight more so than 1800 calorie diet. Now you grouping grains with sugars? You are so lost it's really comical. You live in a fantasy world if you can afford to buy grass-fed beef. And in that fantasy, insulin makes you fat.