Help

I've been eating a certain amount of calories a day. Yesterday I weighed myself and I was a certain weight. I only had less calories yesterday and when I weighed myself today I was more than what I weighed yesterday. how could I gain so much with eating less???

Your body naturally fluctuates in weight every day. Some days you might weigh more because your body is keeping more water weight on or some days you might weight less because you've sweated more.

It's impossible to see on scales fat loss on a day to day basis. If you've not eaten over your recommended calories on one day then the next day there's no way you can have put weight on due to fat, it goes against the laws of physics.

What you're seeing is just daily fluctuations in water weight.

short version when a body is deprived of what it needs it goes into survival mode. it starts storing everything that it takes in as fat cells, the body also survives by gathering what it needs from bone, muscles organs. the result sometimes the person ...looks.....skinnier because bone mass, organs, muscle mass is being affected but can weight in more because whats being taken in is stored and reserved for later.

suggestion rather than starving yourself by limiting what you are taking in consult with your medical doctor (or one in your location) they can help you develop a diet\exercise plan that will not only allow you to restrict your calories, lose weight and not affect your vital organs, bones and muscles.