Consistently consuming excessive amounts of dietary fat can lead to multiple adverse health effects. Firstly, excess fat intake results in surplus calories, which contributes to obesity—a major risk factor for chronic conditions such as type 2 diabetes, hypertension, high cholesterol, and cardiovascular diseases. Secondly, overconsumption of saturated and trans fats—commonly found in fried foods, processed snacks, and certain baked goods—raises levels of ‘bad’ LDL cholesterol, increasing the risk of atherosclerosis and coronary heart disease. Additionally, a high-fat diet may impair liver function, potentially causing non-alcoholic fatty liver disease (NAFLD), which can progress to liver fibrosis or even cirrhosis in severe cases. Long-term high-fat intake may also disrupt gut microbiota balance, negatively affecting digestive health, and has been linked to an elevated risk of certain cancers, including colorectal and breast cancer. Therefore, it is recommended to follow dietary guidelines—such as those from China’s Dietary Guidelines—which advise adults to limit daily cooking oil intake to 25–30 grams, prefer plant-based oils, and minimize high-fat cooking methods like deep-frying and pan-frying to support long-term health.
长期摄入油脂超标会对健康造成多方面危害。首先，过量的脂肪摄入会导致热量过剩，进而引发肥胖，而肥胖是多种慢性疾病的重要诱因，如2型糖尿病、高血压、高血脂和心血管疾病等。其次，过多摄入饱和脂肪酸和反式脂肪酸（常见于油炸食品、加工零食和部分烘焙食品中）会升高“坏”胆固醇（LDL）水平，增加动脉粥样硬化和冠心病的风险。此外，高脂饮食还可能影响肝脏功能，导致非酒精性脂肪肝，严重时可发展为肝纤维化甚至肝硬化。长期高油饮食还会扰乱肠道菌群平衡，影响消化系统健康，并可能与某些癌症（如结肠癌、乳腺癌）的发生存在关联。因此，建议日常饮食遵循《中国居民膳食指南》推荐，成人每日烹调油摄入量控制在25–30克以内，优先选择植物油，并减少油炸、煎炒等高油烹饪方式，以维护长期健康。
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