It Just Means That You're Not Eating Enough. Web if you’re eating less than 1000 calories it would mean your metabolic rate had reduced below that and that just doesn’t really work out in practice. Web yes, eating less should help us lose weight because we are taking in less calories. Web you could be gaining weight from eating the wrong foods on your weight loss diet. Web While Diet Typically Plays The Largest Role In Weight Gain, Other Factors — Such As Stress And Lack Of Sleep — May Contribute As Well.