Widely sold, but oral absorption into the brain is questionable.
What the evidence supports: relaxation measures; the mechanism remains unresolved.
This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.
No established course.
Limited justification given the blood-brain barrier problem.
Other supplements:
Run your full list through the interaction check.