The image of the ancient but youthful-looking sage meditating on a mountaintop might be closer to reality than you think, according to a new study that found that after a three-month stay at a meditation retreat, people showed higher levels of an enzyme associated with longevity.

The study is preliminary and didn’t show that meditation actually extends life, but the findings suggest a possible means by which it could.

Researchers led by Tonya Jacobs of the University of California-Davis compared 30 participants at a meditation retreat held at the Shambhala Mountain Center in Colorado with matched controls on a waiting list for the retreat. Participants meditated six hours per day …