在最具权威的美国FDA（美国国家药物与食品管理局）认证的各种脱毛技术中，唯一被认证为“永久性脱毛”的技术是电针脱毛。

原文网址：

http://www.fda.gov/consumer/updates/hair062707.html

原文：

Epilators: Needle, Electrolysis, and Tweezers
Needle epilators introduce a fine wire close to the hair shaft, under the skin, and into the hair follicle. An electric current travels down the wire and destroys the hair root at the bottom of the follicle, and the loosened hair is removed with tweezers.

Medical electrolysis devices destroy hair growth with a shortwave radio frequency after a thin probe is placed in the hair follicle. Risks from these methods include infection from an unsterile needle and scarring from improper technique. Electrolysis is considered a permanent hair removal method, since it destroys the hair follicle. It requires a series of appointments over a period of time.

Tweezer epilators also use electric current to remove hair. The tweezers grasp the hair close to the skin, and energy is applied at the tip of the tweezer. There is no body of significant information establishing the effectiveness of the tweezer epilator to permanently remove hair.

译文：

脱毛器：针脱毛器，电针脱毛器，镊子脱毛器
针脱毛器是将一根微细的金属丝贴近皮下的毛杆插入到毛囊，电流沿着金属丝向下传导，破坏位于毛囊底部的毛根，然后用镊子将松动的毛发移除。

医学电解设备是把一根细针插入毛囊后，利用短波破坏毛发生长。这些方法的风险包括由于未经消毒的针头引起的感染和由于不适当的操作手法造成的疤痕。电解是受推崇的一种永久性脱毛方法，因为它可以破坏毛囊。它需要在一段时间内进行一系列的预约治疗。

镊子脱毛器也是利用电流来脱毛，镊子夹住靠近皮肤的毛发，电的能量被施加于镊子尖端，没有大量有意义的资料证明镊子脱毛器对永久脱毛有效。

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