Question: how many calories a day do you eat on slimming world?
Answer: Synned foods This is where the counting comes in. You can set yourself between 5 and 15 syns a day depending on how quickly you want to lose weight or how much you have to go until your target. There's about 20 calories in a syn, which equals 4 for a double gin and slimline tonic or 5.5 for a packet of Quavers.