I dont know why people gain weight after a fast because ive researched and stuff about eating disorders pop up , and they said when they start refeeding thier matabolism get refed and people who are in inpatient actually loose weight because thier matabolism speeds up.
but of course you will gain weight after a fast if you binge, because when you start eating and no one is there to control you, as soon as u eat one bit you just keep eating because you continue to feel hungry, but if the fast is broken correctly you will only gain 3-8 lbs back because there is something in ur system it is necessarily fat , i would ask hopiniso she is very wise or read fasting and eating for health

i did gain after a water fast. i felt like my metabolism was really slow.
but more importantly i could see Water Fasting for weight loss leading to an eating disorder where i would never eat.
sooooooooooooooo
i am doing atkins and eating to lose weight now. which fits my personallity more.
and i dont run the risk of equating food intake with failure and fat.
so thats what worked for me.

fasting now is more for a weekend slim down for an event or for cleansing for healing.