Experiments are underway, and the evidence has been tantalizing. In theory, that little scallop of scalp floating in the dish at the Christiano Lab could be the source of a full head of hair. Working toward that future, Christiano and her team harvest the cultured follicles and implant them in artificial skin built in the lab. This skin nourishes the follicle, prodding from it a colorless, keratin-protein filament. The team then removes the productive follicle and grafts it onto the skin of a mouse. The result? Hair growing out of mice — human hair.
Christiano expects to move these trials from mice to people in two to three years, bringing nearer the day when people can grow, in a lab, their own viable hair follicles — a limitless supply of one’s own hair.
https://magazine.columbia.edu/article/radical-solutions-baldness