以下文章来源于肥胖世界ObesityWorld ，作者欢迎订阅 肥胖世界ObesityWorld . 《肥胖世界》Obesity World - 同步传真肥胖及代谢国际新学术进展，为医学减重临床、教研人员搭建一座与国际接轨的桥梁，「每医健」旗下内容平台。 你有没有注意到，冬天似乎更容易变瘦，而到了夏天体重却容易增加？其实，这种现象并非你的错觉！近期，丹麦哥本哈根大学联合瑞典卡罗 林斯卡学院的研究团队发现，季节性的光照时长变化会通过调控进食规律，从而影响人体的能量代谢与脂肪储存。 这项刊登在《Cell Metabolism》的最新成果，让我们看到了无需节食或锻炼也能瘦身的"天然减重新思路"。 一、光照如何成为"隐形减脂教练" 短日照：激活身体的"燃脂开关" 在实验中，科学家们将小鼠分为三组，分别模拟夏季（18小时光照）、冬季（6小时光照）和赤道（12小时光照）的环境。经过13周观察，发 现冬季短日照组（SL）的小鼠体重和脂肪量明显低于另外两组，尤其是高脂饮食的小鼠，脂肪堆积减少最为显著，肝脏中的甘油三酯含量也 下降了约20%。 更令人惊喜的是，短日照组小鼠的能量消耗（EE）呈上升趋势（p=0.061）。这就像身 ...

Core Insights - The article discusses the impact of seasonal light exposure on body weight regulation, highlighting that shorter daylight in winter can lead to weight loss and fat reduction due to changes in energy metabolism and eating patterns [6][11]. Group 1: Mechanisms of Light Exposure on Weight Management - Short daylight activates the body's "fat-burning switch," leading to lower body weight and fat mass in mice exposed to winter-like conditions, with a significant reduction in liver triglyceride levels by approximately 20% [11]. - The study indicates that light exposure influences eating rhythms, where mice in long daylight conditions exhibit disrupted lipid metabolism, while those in short daylight conditions have enhanced fat oxidation and reduced fat synthesis [12]. - Contrary to previous beliefs, melatonin was found not to be the key regulator of seasonal metabolism, as the fat-reducing effects of short daylight persisted even in the absence of melatonin [13]. Group 2: Scientific Evidence Supporting Light-Related Fat Loss - Short daylight alters the circadian rhythms of metabolic genes in peripheral tissues, delaying the peak expression of lipid metabolism-related genes by about 4 hours, which affects fat synthesis and breakdown [14]. - Mice in short daylight conditions showed a higher respiratory exchange ratio (RER), indicating increased carbohydrate utilization and enhanced fat oxidation, with a rhythmic increase in non-esterified fatty acids (NEFA) in the plasma [15]. - Time-restricted feeding (TRF) mimicking short daylight conditions resulted in similar metabolic indicators as those observed in short daylight mice, suggesting that limiting eating times can effectively simulate the fat loss benefits of reduced light exposure [16].