Psilocybin Microdose Enhances Creativity

Study: Microdosing Magic Mushrooms Enhances Creativity, Problem Solving Abilities

... our results suggest that consuming a microdose of truffles allowed participants to create more out-of-the-box alternative solutions for a problem, thus providing preliminary support for the assumption that microdosing improves divergent thinking. Moreover, we also observed an improvement in convergent thinking, that is, increased performance on a task that requires the convergence on one single correct or best solution.

Dosage used was 0.37 grams of dried fungi (sclerotia, often referred to as truffles).  This form of fungi is not as potent as common shrooms, so the equivalent shroom dose would be significantly less.