推荐回答（4个）
中医认为，牛奶味甘平，微寒，能够补虚损，益肺胃，生津润肠，还可用来治疗虚弱劳损、反胃噎嗝、消渴、便秘等。牛奶中含有70%左右的水分，其中的蛋白质和脂肪极易被人体消化吸收。因此，在天气炎热的夏天，饮用牛奶可以补充由于人体出汗而流失的水分，更能增加营养，这对保持夏日身体健康极为有益。
此外，牛奶中含有多种免疫球蛋白，如抗沙门氏菌抗体、抗脊髓灰质炎病毒抗体等，能大大增强人体免疫抗病能力。所以，夏天喝牛奶不仅不会“上火”，还能清热解毒。
尤其是对病后体弱的病人，如患呼吸系统或消化系统疾病的病人，还有糖尿病病人等，牛奶都是一种非常好的营养食品。
中国中医科学院望京医院杨国华主任医师：对于民间流传的“夏天牛奶的营养不如冬天好”的说法是没有科学根据的。因为牛奶营养价值的高低并不决定于季节，而应取决于饲料的营养价值。
需要提醒的是，虽然在夏天牛奶依然是一种非常适宜的营养饮品，但由于夏天气温高，人体消耗了大量的水分，同时由于牛奶性偏寒，又富含蛋白质，加上中医所谓暑湿天气的影响，消化功能最容易受到损伤，所以有些人喝了牛奶，尤其是冰凉的牛奶，容易出现胃肠道不适的表现。所以，有以下情况的病人不太适宜在夏天喝牛奶：
1.胃虚弱者，也就是消化功能偏差，容易腹泻或正在腹泻的病人。
2.痰湿较盛者，比如患有支气管扩张或慢性支气管炎正在急性发作的病人，或者没有食欲、胃腹胀满的病人。
3.有饮食积滞的病人，比如最近贪食煎炸油腻或生冷食物，或者饮酒过量的病人。
4.营养过剩的人。(新华网-健康时报)
怒视上火的，说到夏天喝牛奶，很多人第一反应便是：上火。但医生指出，从中医角度看，“上火”是人体阴阳失衡后出现的内热症，夏季由于天气炎热，人体血气较旺盛，故而极易“上火”。但夏季喝牛奶不仅不“上火”，还能解热毒、去肝火。
中医认为牛奶味甘、性微寒，有润肺胃、生津、通便、补虚等功效，且牛奶中含有78%左右的水分，在易出汗的夏日里饮用，正好可以补充肌体流失的水分。因此，喝牛奶不仅不会“上火”，还能起到清热解毒的作用。尤其是随着天气的变暖，人们的排汗量会增多，而牛奶中近80%是水分，其中的蛋白质等营养又容易被吸收，只要饮用得法。
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扩展资料
牛奶营养丰富、容易消化吸收、物美价廉、食用方便，是最“接近完美的食品”，人称“白色血液”，是最理想的天然食品。牛奶中的蛋白质主要是酪蛋白、白蛋白、球蛋白、乳蛋白等，所含的20多种氨基酸中有人体必须的8种氨基酸，奶蛋白质是全价的蛋白质，它的消化率高达98%。
乳脂肪是高质量的脂肪，品质最好，它的消化率在95%以上，而且含有大量的脂溶性维生素。奶中的乳糖是半乳糖和乳糖，是最容易消化吸收的糖类。奶中的矿物质和微量元素都是溶解状态，而且各种矿物质的含量比例。
参考资料：/health.people.com.cn/n/2015/0804/c14739-27409182.html"target="_blank"title="人民网-喝牛奶通便补虚多喝牛奶会不会上火？">人民网-喝牛奶通便补虚多喝牛奶会不会上火？
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