Having personal experience of yo-yo dieting and trying out all kinds of exercises and weight-loss programs for over a decade now, I really can tell you that the only way one can put off weight and keep it off is if they donât eat at all. And since obesity is all set to become the number one killer within the next decade, it was only a matter of time before someone invented a weight loss trick as simple as these Blue Shade Glasses which make your food look so unappealing that you wont even think of eating for a good few hours. Based on the research that blue is the least appetizing color on the spectrum, these shades, in theory at least; make your food look gross, hence killing your appetite. Unfortunately it doesnât restrict your sense of smell and since you always have the power to take them off, the trick isnât exactly foolproof. Maybe if your tried closing up your nostrils with a clothespin along with these shades it might help you not pounce on the juicy, fragrant piece of double cheese pizza with all that crunchy topping bits dipping in melted cheese and toast sides drenched in butter!