When the temperature falls for many people their appetites go up. Research has shown many people consume more calories during winter compared to the rest of the year. And apparently this isn't just down to Christmas and festive feasting. According to Dr Crystal Wyllie at ZAVA there are scientific reasons behind the increase in appetites. She explains: "When the temperature drops, our bodies instinctively seek more energy to maintain their core temperature. This often manifests as stronger