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there's already drugs that lower dht and hair transplants moving hairs from thick areas to your hair to balding areas. This can work very well (see elon musk for example)
For pretty much complete baldness there's the proposed technique of hair cloning.
Wikipedia-The basic idea of hair cloning is that healthy follicle cells or dermal papillae can be extracted from the subject from areas that are not bald and are not suffering hair loss, they can be multiplied (cloned) by various culturing methods and the newly produced cells can be injected back in the bald scalp, where they would act healthy and produce hair. In 2015, initial trials for human hair were successful in generating new follicles, but the hairs grew in various different directions giving an unnatural look. As of 2019, scientists believe they may have solved this problem by using nearly microscopic 3D printed shafts to assist follicles growing upward through the scalp. This technique however is still in research phase and is not available for public or commercial use.
>When will they make a cure for male pattern baldness
how should I know that?