If you're on TikTok, you've likely come across TikToker @SmallerSam_PCOS, who's gone viral for her low-calorie fast-food orders and menu hack videos ... that's less than 500 calories and jam ...

We found that diet ... calories you can consume to try to lose an inch in four weeks*. It tells you how many calories you need each day to maintain your weight, and you should reduce that figure ...