民间骗局的土方子根本不能治病。通过染发来解决年龄带来的白发问题是很普遍的选择，但一些人会想着让白发重新变黑。比如来自长沙的郭女士就想寻找一种能让她头发重新焕发年轻的方法。于是，她在网络上找到了一个所谓的秘方，声称可以让头发变黑。

这个秘方来自当地一家美容护理院。据他们称，每次治疗半个小时，半个月治疗一次，大约五次治疗后就可以把白发全部去除。然而，当郭女士来到美容院后，她发现所谓的治疗过程就是洗头、按摩，然后工作人员开始拔她的头发，这个治疗会持续一个多小时，最后涂上不知名的药水。

郭女士做了三次之后便无法承受。原来所谓的白发去除就是把白色的头发全部拔掉，这家美容院的工作人员却解释称这类白发不可能变黑，必须先把这些白头发拔掉，然后等新的黑发长出来，才能达到让头发变黑的效果。然而，当郭女士要求退款时，美容院老板并未同意。这一事件被告到长沙消费者协会，最终美容院只能退还郭女士1000多元的余额。调查发现，该美容院并没有合格的营业资质。

实际上，大多数民间所谓的土方根本不存在科学基础，无法治疗疾病。因此建议大家在选择治疗时最好选择大医院，同时在做某些项目时也应该签署合同，以避免出现纠纷时缺乏法律依据。

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Chinese article rewritten in high-quality language:

The use of traditional folk remedies can do more harm than good. While many people choose to dye their hair black to mask the signs of aging, some may seek alternative treatments to naturally restore their hair to a youthful state. A woman named Ms. Guo in Changsha, for instance, went online in search of a "secret formula" that could turn her white hair black.

She discovered a clinic that claimed to have such a treatment. According to the clinic, which did not possess any business licenses, each session would take thirty minutes, with a half month waiting period between each one. After about five sessions, all of the white hair would be gone. Ms. Guo underwent the treatment process, which included a hair wash, scalp massage, and over an hour of hair pulling, and ended with the application of an unknown liquid. However, she abruptly stopped the process after three sessions, as she felt unsatisfied with the results.

It turned out that the clinic had been pulling out Ms. Guo's white hairs during the treatment, claiming that this was necessary because white hair could not be turned black. The hair would supposedly regrow as black hair. When Ms. Guo tried to get a refund, the clinic refused, forcing her to take legal action. After several rounds of mediation by the Changsha Consumer Association, she received a refund of the remaining balance, but the episode left her frustrated.

Most traditional folk remedies lack scientific backing and can lead to adverse outcomes. It is advisable to seek professional medical treatment in reputable hospitals. For those who do choose to undergo alternative treatments such as this, it is crucial to sign a contract beforehand to protect oneself from any contractual disputes.