Core Viewpoint - The article discusses the transformation and regulation of internet health science popularization in China, emphasizing the need for accurate and scientific communication in the face of commercialization and misinformation [1][3]. Group 1: Regulatory Measures - The National Health Commission has issued a "Negative Behavior List" for medical personnel in internet health science popularization, establishing clear boundaries for acceptable conduct [1][3]. - The new regulations aim to prevent medical professionals from promoting content outside their expertise and from using their professional identities for commercial gain [3][4]. - The introduction of a health science account registration system in Shanghai has recorded 9,965 accounts, indicating a structured approach to monitoring and regulating health science communication [5]. Group 2: Challenges in Health Science Communication - The rise of "internet celebrity doctors" and the commercialization of health advice pose significant risks to the credibility of medical professionals [3][4]. - There is a concern about the misuse of artificial intelligence in generating health content, which can lead to misinformation if not properly regulated [4][6]. - Medical professionals face pressure to produce content that may not align with their expertise, which can undermine the integrity of health communication [2][3]. Group 3: Opportunities for Quality Content - The new regulations are seen as a chance to enhance the quality of health science content, allowing for the emergence of more credible and engaging materials [7][9]. - Medical professionals express a commitment to providing accurate health information, recognizing their role in alleviating public anxiety and promoting health awareness [7][8]. - Initiatives are being developed to support the creation of high-quality health science content, including training programs and resource libraries [8][9].

Core Viewpoint - Weight rebound after dieting is not merely a failure of willpower but a complex interplay of physiological, behavioral, environmental, and psychological factors [2][3][4][5][6] Physiological Factors - Metabolic adaptation leads to a decrease in basal metabolic rate post-weight loss, causing the body to enter an "energy-saving mode," making it easier to gain weight back when returning to previous eating habits [3] - Hormonal imbalances occur, with leptin levels dropping by 30%-50% and ghrelin levels rising, which can trigger feelings of hunger even after eating [3] - Fat cells retain a "memory" of previous obesity, leading to rapid weight gain when high-calorie diets are resumed, often resulting in a higher fat percentage than before [3] Behavioral Factors - Short-term dieting habits are difficult to maintain long-term, leading to a return to old eating patterns when life becomes busy or stress increases [4] - Emotional eating can resurface, where food becomes a source of comfort during stressful times, leading to uncontrolled calorie intake [4] Environmental Factors - The modern nutritional environment is filled with temptations, such as high-calorie snacks and fast food, which are easily accessible and designed to be appealing [5] - Social situations often lead to increased calorie intake, with studies showing that people consume over 40% more calories in social settings compared to eating alone [5] Psychological Factors - A "task completion" mindset can lead to binge eating after reaching weight loss goals, as individuals may feel liberated from dietary restrictions [6] - "All-or-nothing" thinking can cause individuals to abandon their diet after a minor slip-up, leading to a complete loss of healthy eating habits [6] Strategies to Prevent Rebound - A systematic approach involving dietary, exercise, environmental, and psychological adjustments is necessary to maintain weight loss [7][8] - Gradual caloric transition post-weight loss is recommended, along with a focus on high-protein and whole grain foods to enhance satiety and reduce muscle loss [9] - Incorporating strength training and aerobic exercises can help maintain metabolic rate and muscle mass [10] - Modifying the home environment to reduce access to high-calorie foods and managing social eating situations can support weight maintenance [11] - Cognitive restructuring techniques can help set new goals and establish support systems to maintain motivation and prevent rebound [12]