Have you been trying to lose weight for a while but have not been able to keep those kilos from stacking up? Here's a probable explanation for your weight loss efforts going vain. A new study says that late night snacking can hamper your weight loss efforts. This study was conducted on fruit flies and the researchers found that after feeding the flies for 12 hours a day the flies slept better gained less weight and had healthier circulatory systems when compared to flies that had no dietary restrictions. This effect is thought to be linked to body clock genes