Why hasn't rogaine been used by the beauty industry for woman who want longer hair?

If rogaine and other hair regrowth stimulation products work, why hasn't the beauty industry used this technology to make hair products for women to grow their hair faster? So many women want to grow their hair and it takes so long, so why hasn't this been used for that kind of thing?Why hasn't rogaine been used by the beauty industry for woman who want longer hair?
it probably doesnt work.Why hasn't rogaine been used by the beauty industry for woman who want longer hair?
its made for men, my dad has it.













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