会。牛奶在加热过程中，会使牛奶中的一些营养素发生变化，比如维生素B2和维生素C等，这些营养素会损失一部分，所以牛奶加热会损失营养。加热的温度越高、时间越长，破坏就越严重。特别是有些朋友会将牛奶倒入锅中直接煮沸，或者放入微波炉中高温加热，这会导致牛奶的营养价值大打折扣。
牛奶，不仅能补钙，营养价值还高，是老少皆宜的一种健康饮品。
不过，最近天气越来越冷了，很多人在这时候喝凉的，肚子会不舒服，于是就习惯将牛奶加热再喝。
但是牛奶加热其实也是有讲究的，那么今天小薇就来教教大家牛奶到底要怎么热~
牛奶加热后，会损失营养物质吗？
加热会不会损失营养，主要看温度。
高温加热奶：
也就是牛奶开始冒泡的程度，这时候其中的维生素、蛋白质等不耐热的营养物质就会开始流失，并且牛奶开始沸腾后还容易出现乳糖焦化现象，不仅口感变差，还不利于人体吸收。
低温加热奶：
也就是牛奶微微冒热气的程度，而这个温度不仅不烫口，还不会对牛奶中不耐热的营养物质造成破坏。
牛奶怎么加热比较好？
这就需要根据不同的牛奶，来进行分类：
常温奶（盒装/瓶装奶）
方法1：倒出下锅加热至微微冒热气后关火。
方法2：倒入玻璃杯或可微波的容器后，放入微波炉加热60s-90s。
冷藏奶（袋装鲜奶）
采用隔水浸泡加热，将鲜牛奶带包装或倒入玻璃杯后，放进90℃左右的热水中浸泡60s。
加热后有奶皮的牛奶，营养更好吗？
奶皮与牛奶的营养价值并没有关系。
奶皮其实就是牛奶中的脂肪和蛋白质遇热凝固形成的，就类似于鸡蛋煮熟后蛋液凝结成蛋清一样的。
而没有奶皮的奶，是因为乳品厂在加工时将脂肪打碎，使其均匀地分布在牛奶中，一方面防止脂肪上浮产生分层的现象，另一方面也更有利于人体吸收。
牛奶还没喝完就不热了，可以再加热来喝吗？
不可以。
牛奶在加热后，部分蛋白质已经发生沉淀，如果重新加热，会导致更多的蛋白质沉淀，甚至会形成豆腐渣状。
晚上喝热牛奶，真的可以助眠吗？
不可以。
牛奶中的「色氨酸」的确能帮助入眠，但只是喝一杯牛奶的量，是达不到有效量的。
而部分人之所以觉得喝杯热牛奶之后就睡得好了，其实主要还是因为热牛奶起到了安慰剂的效果。
据说，刚挤的奶马上喝，营养最好？
假的！
刚从牛身上挤出来的生牛奶，本就含有大量的细菌，即便是加热煮沸，也无法保证杀灭全部细菌，并且因为这类生牛奶不符合食用标准，所以国内外的法规都不允许售卖。
总而言之，不论是什么样的奶，都要掌握正确的加热方法，才能喝到营养又健康的热牛奶。
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