提起胆固醇，很多人就想到了心脑血管疾病。据天津市第三中心医院消化（肝病）科哈福双副主任医师 介绍，门诊很多高胆固醇血症的患者，为了保护心脑血管，吃鸡蛋不敢吃蛋黄，动物内脏更是完全舍 弃。事实上，胆固醇并没有这么可怕，它不仅不是健康的"敌人"，甚至可以说，没有它就没有生命。 （来源：天津日报） 转自：天津日报 哈福双说，胆固醇是生命之源。简单来说，细胞新陈代谢、大量激素合成，都得靠胆固醇"供能"。大脑 30%是胆固醇，缺乏胆固醇，可以导致大脑萎缩、记忆力下降；细胞膜20%至30%是胆固醇，缺乏胆固 醇，细胞不能正常工作。肾上腺皮质激素、雌激素、雄激素、孕激素的合成都离不开胆固醇。缺乏胆固 醇，不仅影响情绪，还会影响性功能及生育功能。维生素D的生成也需要胆固醇，胆固醇在阳光照射下 会转化为维生素D，有了维生素D，骨骼才能富有钙质、更为强健。 "通常人们更担心胆固醇中的低密度脂蛋白升高会促进动脉粥样硬化，从而增加了对鸡蛋特别是蛋黄的 误解。实际上，鸡蛋吃多了不会升高胆固醇。"哈福双说。血脂检查需要空腹。经过一夜禁食后，化验 单上升高的低密度脂蛋白其实主要是来自肝脏合成的"内源性胆固醇"。吃进去的外源性胆固醇只有餐后 ...

Core Insights - The article discusses the relationship between maternal cholesterol levels during pregnancy and the risk of congenital heart defects (CHD) in offspring, highlighting the importance of cholesterol in fetal development [2][10]. Group 1: Research Findings - A study published in "Signal Transduction and Targeted Therapy" indicates that low maternal cholesterol levels during pregnancy are significantly associated with an increased risk of CHD in offspring, particularly during mid to late pregnancy [3][6]. - The research involved a cohort of 5,041 family trios and found a notable correlation between maternal low cholesterol levels and the incidence of CHD in children [6]. - The study utilized cholesterol-lowering drugs, ezetimibe and atorvastatin, on pregnant mice, which resulted in a significant increase in the incidence of CHD in their offspring [8]. Group 2: Genetic Insights - Whole-genome sequencing of 103 children with CHD identified a pathogenic mutation in the CYP51A1 gene, which affects cholesterol synthesis and disrupts Hedgehog (Hh) signaling, leading to CHD [8]. - The study created a Cyp51 I383V gene knock-in mouse model to further investigate the link between cholesterol synthesis and CHD, confirming that dietary cholesterol supplementation could significantly reduce the risk of CHD in offspring of mutant mothers [8][10]. Group 3: Implications for Maternal Health - The findings suggest that maternal cholesterol supplementation during pregnancy could be an effective strategy to lower the risk of CHD in children, emphasizing the need for further research in this area [10].

Group 1 - Cholesterol is an essential substance for the human body, playing a critical role in synthesizing hormones and vitamin D, and forming cell membranes [3][4] - Cholesterol levels can be influenced by both internal factors (genetics, diseases) and external factors (lifestyle habits such as diet and exercise) [4] - There are two types of cholesterol: high-density lipoprotein (HDL-C) known as "good cholesterol" and low-density lipoprotein (LDL-C) known as "bad cholesterol" [5][6] Group 2 - High levels of LDL-C can lead to serious health issues such as coronary heart disease and stroke, while HDL-C helps to remove excess cholesterol from the bloodstream [6][7] - It is important to assess cholesterol health through a comprehensive analysis of various blood lipid indicators, not just total cholesterol [8][10] - Individual cholesterol levels can vary based on personal health history, age, and lifestyle, making it essential to consider these factors when evaluating cholesterol [7][8] Group 3 - Dietary recommendations for lowering cholesterol include increasing intake of whole grains and high-quality fats while avoiding saturated and trans fats [10][12][14] - Regular physical activity is advised, with recommendations for at least 150 minutes of moderate-intensity aerobic exercise per week [22] - If lifestyle changes are insufficient, medication may be necessary, with common options including statins and cholesterol absorption inhibitors [24][25]

Core Viewpoint - The recent controversy surrounding Heytea's trans fatty acid content has raised significant questions regarding food safety standards and transparency in product labeling [1][2]. Group 1: Product Testing and Results - A recent inspection of eight popular tea brands, including Heytea, revealed that Heytea's "Baked Brown Sugar Bubble Milk Tea" had the highest sodium content at 942 mg/kg, exceeding the average of the other seven brands by 5.2 times [1]. - Heytea's product also recorded a trans fatty acid content of 0.113 g/100 g, which is the highest among the tested brands, and its cholesterol level was notably higher at 12.1 mg/100 g [1]. - The testing results indicated that sodium content in the eight brands ranged from 100 to 900 mg/kg [1]. Group 2: Regulatory Standards - According to the national food safety standard (GB28050-2011), products can claim to be "free of trans fatty acids" if the content is less than or equal to 0.3 g/100 g for solids [3]. - The same standard allows products to be labeled as "low cholesterol" if the cholesterol content is less than or equal to 20 mg/100 g [3]. - The report from the National Food Safety Risk Assessment Expert Committee states that the average trans fatty acid content from natural sources in dairy products is 0.83 g/100 g [2]. Group 3: Company Background - Heytea operates under Shenzhen Meixi Western Restaurant Management Co., Ltd., which was established in 2016 and is primarily engaged in the catering industry [6]. - The parent company, Shenzhen Heytea Enterprise Management Co., Ltd., was founded in 2013 and focuses on business services, with a registered capital of 2.13 billion RMB [6].

Core Viewpoint - Healthy eating can prevent and control cardiovascular diseases, while unhealthy diets increase the risk of such diseases [1] Group 1: Foods to Limit - Limit salt intake to no more than 5 grams per day and avoid foods high in hidden salt such as soy sauce and processed meats [2] - Reduce consumption of fatty meats as excessive animal fat can raise blood lipid levels [3] - Minimize intake of organ meats due to their high cholesterol content, which can also elevate blood lipid levels [4] - Refine grains should not exceed 50% of staple foods; increase the proportion of whole grains [5] - Processed meats should be strictly controlled due to high salt and potential food safety issues [6] - Limit saturated fats found in animal fats like beef tallow and lard, as recommended by dietary guidelines [7] - Avoid trans fats commonly found in snacks and fried foods, as they increase the risk of cardiovascular diseases [8] Group 2: Foods to Include - Consume fish at least twice a week, with 50 grams of fatty fish like mackerel or salmon meeting daily DHA requirements [10][11] - Whole grains should make up more than one-third of staple foods [12] - Daily intake of dairy products should be 300-500 grams; low-fat options are recommended for those at risk of cardiovascular diseases [13] - Include 25 grams of soybeans or equivalent soy products daily for their health benefits [14][15] - Daily fruit intake should be 200-350 grams, focusing on vitamin C-rich options [16] - Daily vegetable intake should be 300-500 grams, with a variety of types for optimal health benefits [17][18] - Nuts should be consumed weekly in amounts of 50-70 grams, as they contain beneficial unsaturated fats [19] - Moderate coffee consumption is beneficial, with a recommended daily caffeine limit of 210-400 milligrams [20][21] - Regular tea consumption is associated with reduced risks of various diseases [21] - Eating chili peppers may lower mortality rates related to heart diseases [22] Conclusion - A diverse diet incorporating the recommended foods can significantly reduce the risk of hypertension and cardiovascular diseases, emphasizing the importance of variety in daily and weekly food choices [22]

Core Insights - Eggs, particularly egg yolks, are a rich source of essential nutrients and should not be discarded due to misconceptions about cholesterol [1][2] Nutritional Value of Egg Yolks - Egg yolks contain 15.2g of protein per 100g, which is higher than egg whites at 11.6g per 100g, and provide all eight essential amino acids with a biological availability of 98% [2] - Each 100g of egg yolk contains 680mg of choline, fulfilling 35% of the daily requirement for adults, which is crucial for brain development and cognitive function [2] - Egg yolks are rich in fat-soluble vitamins such as A, D, E, and B vitamins, making them irreplaceable in terms of nutrition [2] Cholesterol Management - Cholesterol in the blood primarily comes from endogenous sources (70%-80%) rather than dietary intake (20%-30%), indicating that the body's own production has a greater impact on blood cholesterol levels [3] - Despite the high cholesterol content in egg yolks (approximately 1510mg per 100g), lecithin helps to mitigate its effects by emulsifying cholesterol and promoting its metabolism [3] Recommendations for Special Populations - Individuals with high blood lipids or cardiovascular issues should limit egg yolk intake to one per day and monitor blood lipid levels [4] - Pregnant women are advised to consume 2-3 eggs daily to support fetal brain development [4] - Older adults can consume 2 egg whites and 1 egg yolk daily to help prevent cognitive decline [4] Cooking Methods for Nutritional Retention - Boiling eggs for 8 minutes is recommended to balance nutrition and safety, preserving over 90% of vitamins while inactivating anti-nutritional factors [5][6] - Precautions should be taken to avoid salmonella infection, including proper storage and cooking of eggs [7] Safe Egg Consumption Practices - Eggs should be refrigerated and thoroughly cooked to prevent salmonella infection, especially for vulnerable populations like infants and the elderly [7] - Following a balanced approach to egg consumption, including pairing with vegetables and whole grains, is encouraged for optimal health benefits [7]