Researchers took blood plasma from people who had just finished a week-long meditation retreat, dripped it onto neurons growing in a dish, and watched the cells extend longer branches than they did with the same people's pre-retreat plasma. An author correction rewrote the paper's title to clarify that the study was observational rather than interventional. Funding came from the InnerScience Research Fund, which backs a multimillion-dollar UC San Diego meditation initiative, alongside a Veterans Administration Research Career Scientist Award. An author correction is a routine amendment requested by the authors. Plasma drawn after the retreat caused laboratory-grown neurons to extend significantly longer branches than the same participants' pre-retreat plasma.