Could a Cellular Tweak 'Switch Off' Gray Hair? Source: http://www.webmd.com/healthy-aging/news/20160428/could-a-cellular-tweak-someday-switch-off-gray-hair?src=RSS_PUBLIC Scientists spot a molecular signal controlling skin and hair color … Source: http://www.webmd.com/healthy-aging/news/20160428/could-a-cellular-tweak-someday-switch-off-gray-hair?src=RSS_PUBLIC Scientists spot a molecular signal controlling skin and hair color … What Do You Think? comments