The same year, Grace Pavlath, a biologist at Emory University, published a study on olfactory receptors in skeletal muscles. She found that bathing the receptors in Lyral, a synthetic fragrance redolent of lily of the valley, promoted the regeneration of muscle tissue. Blocking these receptors (by neutralizing the genes that code for them), on the other hand, was found to inhibit muscular regeneration, suggesting that odor receptors are a necessary component of the intricate biochemical signaling system that causes stem cells to morph into muscles cells and replace damaged tissue.
— Read more at Smell Turns Up in Unexpected Places at the New York Times. Hat tip to Aparatchik!