For Extra Health Benefit, Don't Chill Watermelon US Department of Agriculture scientists reported that watermelons stored at room temperature offer more nutrients than refrigerated or freshly picked melons. They found that watermelon stored at 70 F had up to 40% more lycopene and 50% to 139% more beta-carotene than freshly picked fruit. The researchers said their findings showed that watermelons continue to produce nutrients after they are picked and that chilling slows this process. More on the subject... Tgs: nutrition, health, fruit, food storage