According to a US study, plucking hair in a specific pattern can lead to growth of more hair. Altering the density of hair removed changed the number of hair that grew again.

In the study, the team regenerated 1,300 hairs by plucking 200. The study has been published in Cell journal. According to experts, it was 'really nice science', but it is not clear that whether this could be a treatment for human baldness. By the age of 50, half of men have male-pattern baldness.

The team at the University of Southern California was studying how hair follicles interact with each other to choose the scale of repair job required. The researchers removed 200 hair follicles from a circular patch of skin in mice in a series of experiments.

It was also found in the study that a low-density pluck caused no regeneration at all. In low-density pluck, follicles were removed from a patch 6mm in diameter. In a medium-density pluck, 1,300 new hair were generated, in which
200 hair were removed from a 5mm circle. A higher-density puck led to regeneration of 780 new hair, in which there were same number of hair but were removed from a 4mm diameters circle.

According to Chris Mason, professor of regenerative medicine at University College London, "It's a really nice piece of science. The idea of quorum sensing is smart. But it is not known whether it will cure human baldness. That's the million-dollar question. I'm not sure. As it stands here, you've got to have some hair to pluck.

Mason added that hair re-growth has been noticed in many studies, but it is usually light-colored baby hair. However, in new study, the hair produced are adult hair.