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胡子会越刮越粗吗?是事实还是被骗,真相在此

科普中国微平台 2018-07-18

  本文专家:纪光伟,武钢二医院主任医师、武汉科技大学兼职教授

  胡子对于男人来说,那就是爷们儿的象征啊。然而,胡子多了也会有多了的烦恼。

  在笔者十几岁开始长胡子的时候,就听人说,胡子刮不得,越刮越粗,越刮越黑。街坊的男人们也为天天刮胡子而烦恼,为了避免每天刮胡子,经常可以见到那些大人们拿着两个五分的硬币,夹着胡子,活生生地把它从毛囊中拔出。当时我也学着大人们拔胡子,拔了一根后,那个疼啊,笔者不得不放弃了。

  现在有了电动剃须刀,也很少看到拔胡子的人了。那么,胡子会不会越刮越粗,越刮越黑呢?要回答这个问题,我们先来看看胡子是怎么形成的?

  胡子是怎么练成的

  胡子生长是与雄性激素密切相关的。男性大约在10岁~14岁左右,第一根胡须就会破“土”而出,这是男孩与男人的分水岭,是进入青春期的标志之一。

  但胡子的生长除了与雄性激素有关外,还与遗传因素有着密切关系,一般认为,白种人男性的胡须要比其他种族的男子要茂密;父亲的胡须茂密,儿子的胡须也会茂密,这是家族遗传决定的。同时,胡须的多少,还与长胡须部区(部位)的毛囊是否发达有关。

  割韭菜的启示

  我们都吃过韭菜,韭菜是一种多年生草本植物,它在地下长着不太明显的鳞茎,在鳞茎里贮藏了许多营养物质,就是靠这些营养物质,使韭菜割掉后能很快地再生长。“割韭菜”往往是形容除不尽一茬一茬的再长。

  我们割掉韭菜后,新生长出来的韭菜是硬的,生长了一段时间后,韭菜就恢复了原来的形态了,尖端开始变软了。因此,我们要说韭菜越割越粗,是没有依据的。

  胡子会越刮越粗吗

  从上面的资料,我们不难看出,胡子的多少和粗细是与雄性激素、遗传因素和毛囊的分布情况决定的,而与是否刮胡子没有明显的关系。

  刮胡子后的胡须变硬,与割韭菜的道理是一样的,等胡子长长了,自然就会变软了。

  因此,刮胡子越刮越粗实际上是我们的一种错觉,加上人们以讹传讹,胡子会越刮越粗,就自然成为“真理”了。

  只要我们学会应用科学的知识,来进行科学的推理,就不会上这种传言的当了。可以负责任地告诉大家,胡子该刮就刮,粗的刮不细,细的刮不粗。胡须只会按照它自身的规律生长的。

责任编辑:王超

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