Ypu dont need to fast, just eat at a calorie deficit for a period.
If you do a few cycles of restricting, such as keeping your calorie intake to 1200 a day for at least 2 weeks, and then binge eating to make sure your calorie intake is 3000+ calories a day, you are highly likely to force your body into survival mode. This will mean it will focus on storing fat reserves in preparation for periods of reduced food intake, causing weight gain and reducing your likelihood of losing said weight.
1 year
