I you do fasting for a day. You will lose 1.5kg weight in next day.
This will occur if your body has good metabolisms.
But next day you will regain around .75 to 1kg.
Because in 1.5 kg lost weight there was a plenty of water weight drop.
As we don’t consume salt on fasting days.
And salts hold a lot of water.
As our body is made up of nearly 70% water, so that weight loss happens.