许多家长认为，孩子吃得多、体重增加，说明营养足够。然而，事实并非如此。肥胖儿童不仅面临着体 重过重带来的健康风险，还可能出现营养摄入失衡的问题，导致一些关键营养素的缺乏。本篇文章探讨 肥胖儿童最容易缺乏哪些关键营养素，以及如何通过合理的饮食调整来帮助他们获得均衡的营养。 一、肥胖儿童的营养误区 1.维生素D：维生素D在钙的吸收和骨骼健康中扮演着重要角色。然而，肥胖儿童经常缺乏足够的维生 素D，这与其体内脂肪含量较高、维生素D储存在脂肪组织中密切相关。肥胖儿童体内的脂肪可能会"囤 积"过多的维生素D，导致血液中活性维生素D浓度降低，使得它无法在身体中发挥正常作用，进而导致 骨密度下降，增加骨折的风险。 肥胖并非简单的"吃得多"问题，它背后往往隐藏着饮食结构不合理、营养不均衡等深层次的原因。很多 家长可能认为，肥胖儿童就是吃得多、营养摄入过剩，但实际上，肥胖儿童往往缺乏一些重要的营养 素。 1.热量过剩、部分营养素不足：肥胖儿童通常会摄入过多的高热量、高脂肪、高糖分的食物，如薯片、 糖果、饮料等，而这些食物常常缺乏必要的维生素、矿物质、膳食纤维等营养素。虽然热量摄入过多， 但其他重要营养素的摄入却不足。 2.偏食 ...

维生素D不仅是维持骨骼健康的关键营养素，还与免疫力、心血管健康、情绪调节等密切相关，但很多 人可能没有意识到自己存在摄入量不足问题。 《维生素D及其类似物的临床应用共识(2025版)》显示，我国维生素D缺乏患病率为61.3%，维生素D不 足患病率为91.2%。 《生命时报》综合多位专家观点，总结缺乏维生素D的后果，并给出科学摄入方案。 维生素D影响身体多项功能 很多看似不相干的健康困扰，背后可能指向同一个"致病"因素：维生素D缺乏。 影响脂肪的分解利用 武汉市中心医院慢病管理中心主任医师丁胜表示，维D的脂溶性和疏水特性，可以参与调节脂肪细胞的 合成与分解，从而影响脂肪组织的代谢活动。 当体内维D明显缺乏时，脂肪的分解和利用会受到影响，从而导致脂肪累积增加，体重增长。 首都医科大学附属北京朝阳医院营养科主任贾凯表示，尤其是年龄35岁以上人群，身体新陈代谢可能开 始变缓慢，身上脂肪变多，可尝试着补充一些和脂肪燃烧、身体代谢相关的维生素，如维生素D，有助 避免脂肪堆积，加速新陈代谢。 国际医学期刊《阿尔茨海默病》杂志上发表的一项研究，分析了美国国家阿尔茨海默病协调中心的 12388名无痴呆症、平均年龄为71岁的参与 ...

Core Viewpoint - Osteoporosis is no longer considered a disease exclusive to the elderly, as poor lifestyle habits are accelerating bone mass loss in younger individuals, necessitating early identification and scientific intervention [1][5]. Group 1: Risk Factors - Osteoporosis is characterized by low bone mass and microstructural damage, leading to increased fragility and risk of fractures. It is divided into primary (age-related and postmenopausal) and secondary osteoporosis caused by diseases or medications [2]. - Individuals with metabolic diseases such as hyperthyroidism and diabetes, long-term use of corticosteroids, and those who smoke or consume alcohol are at higher risk for secondary osteoporosis [2]. Group 2: Symptoms - Common symptoms include unexplained fatigue, back or joint pain, and recurrent leg cramps, which are often overlooked [3]. - More direct indicators include a height loss of over 3 centimeters compared to youth, and brittle nails. Advanced symptoms may lead to decreased weight-bearing ability and spinal deformities, with the most severe risk being "fragile fractures" from minor incidents [3]. Group 3: Prevention and Management - Prevention strategies include a comprehensive treatment plan rather than just calcium supplementation. Key approaches involve: 1. Supplementing calcium and vitamin D through dietary sources like dairy, legumes, nuts, and fatty fish, or through supplements under medical guidance [7]. 2. Engaging in moderate exercise such as walking, tai chi, and jogging to enhance bone strength and balance, while avoiding excessive strain [7]. 3. Managing body weight, avoiding smoking and excessive alcohol, and maintaining a positive emotional state [7]. - The emphasis is on early bone mass accumulation, particularly around the age of 30, with recommendations for regular outdoor activities and muscle-stimulating exercises [7]. Group 4: Safety Tips - To prevent fractures, individuals are advised to follow the "three do's and three don'ts" guideline, which includes moving slowly, ensuring proper lighting, and maintaining stability in the home environment [8].

Core Viewpoint - Overexposure to sun protection measures can lead to vitamin D deficiency, which is linked to osteoporosis, as demonstrated by a case of a 26-year-old girl diagnosed with the condition due to excessive sun protection [1][3]. Group 1: Impact of Sun Protection on Vitamin D - Sun protection methods, while preventing skin damage, significantly reduce the body's ability to synthesize vitamin D, which is crucial for calcium absorption and bone health [3][5]. - Approximately 80% to 90% of vitamin D is synthesized through skin exposure to UVB rays, and just 10 to 30 minutes of daily sun exposure is sufficient for adequate vitamin D levels [5][7]. Group 2: Vitamin D Deficiency Statistics - In China, there is a notable prevalence of vitamin D deficiency among children aged 0-18, with a severe deficiency rate of 2.46%, a deficiency rate of 21.57%, and an insufficiency rate of 28.71% [7]. Group 3: Recommended Vitamin D Intake - The recommended daily intake of vitamin D is 400 IU (10 micrograms) for individuals aged 0-65, and 600 IU (15 micrograms) for those over 65 [7][11]. Group 4: Risks of Excessive Vitamin D - While vitamin D toxicity is rare, it can occur, leading to symptoms such as hypercalcemia, which may result in kidney stones and other health issues [8][10]. Group 5: Safe Supplementation Practices - The safe upper limit for daily vitamin D intake is 2000 IU (50 micrograms), and individuals should be cautious not to exceed this amount when taking supplements [10][11]. - Outdoor activities and sun exposure are the most effective ways to obtain vitamin D, with dietary sources such as fatty fish and fortified milk also contributing to intake [11][13].