Basically, when a fat says they eat 1200 kcal they mean that they only mark down 1200 kcal. The 6 litres of full fat coke is only a drink so they don't count the 2520 kcal for that. The 4 tubs of zero fat ice cream gets put down as zero kcal because it is fat free. However, due to being fat free they add a fuckton of sugar so that's another 1000 kcal they have note added. So when they say 1200 kcal and lost no weight they're actually eating at least 4720 kcal. They then mindfully restrict to 1600 kcal and lose weight because 1600 < 4720.         7ff8