A capsule's shell material isn't always obvious from the named active ingredients alone — worth checking directly if a vegan or vegetarian diet matters to your decision.
Confirm directly with the seller whether the capsule shell is gelatin-based (not vegetarian) or a plant-based alternative like HPMC, since this isn't specified among the six named ingredients on the pages reviewed.
Ginkgo Biloba, Bacopa Monnieri, L-Theanine, Vitamin B12, Phosphatidylserine, and Rhodiola Rosea are all plant-based or naturally-derived compounds, but the shell material itself is a separate formulation choice worth confirming.