Which one does it hold your body fat longer , Sugar or Salt?

I agree. salt does. you should use very little salt, too much is not good for you

Neither one "holds" fat. High salt intake can lead to water retention. That might make the number on the scale appeal larger, but strictly speaking that's not fat. That's water. Sugar can contribute to weight gain. Anything with macronutrients - protein, fat, carbohydrate - can make a person gain weight. Sugar is even more likely to cause weight gain. Insulin, a hormone produced by the pancreas, is important in fat regulation. When you eat a lot of carbohydrate, you need a lot of insulin to uptake the glucose (sugar) into your cells. Any excess glucose you consume that you don't need for energy may get moved into fat cells, especially with all that circulating insulin.

Salt holds water. Sugar can put on weight but it does hold fat in anyway. If you eat food with fat in it that adds to your fat you already have on your body. Too lose weight you need a balanced diet and there are many different types of diets. Mostly they are about cutting down on calories. Exercise is important too if you want to lose fat and tone up your muscles.

Salt: Sugar you can burn off.

I don't think either one holds body fat. Salt does hold water, but not fat. Sugar can attract fat, but not hold it. At least that's what I think.

I would say salt, because it tends to cause the body to retain fluids. Sugar makes fat in the cells and adds extra weight. I hope that helped.