You know that eating too much fat or sugar can make you gain weight but did you know that salt can also be a reason for why the numbers on that scale aren t going down? How salt makes you gain weight? While too much intake of salt can have many adverse effects on your health it can also increase water retention which increases your weight. If you eliminate the excess salt the water will flush out and the weight will go back down. Salt may not have calories but excessive intake of salt can make you feel hungry .