Fat Weight Versus Short Term Weight Gain

This article is good here

Stuff your face or full your body with food and jump on the scales. Scary. You just put on a few lbs.  Can be as high as 5-6 lbs in just one day!) and think your plans have been decimated. But its not like that. It takes time to turn excess calories to fat. What you are seeing the contents of your food plus water retention. High salt foods will increase water retention too.

You may also wake up weighing more. The science behind that is simple. Here

As long as your overall calories deficit plan is on schedule you will lose weight in the form of fat loss. Here are the food and drinks that will create short term weight gains here that do not turn to fat weight gains provided you retain and overall calorie deficit.