Exact-molecule evidence boundary: the live abstract reports the quoted finding for Valerian; no broader inference is made.
Extracts of the roots of valerian (Valeriana officinalis) are widely used for inducing sleep and improving sleep quality.
Valerian for sleep: a systematic review and meta-analysis.
Evidence scope. Exact molecule wording appears in the quoted live sentence. Only the population/model, formulation, route, and outcome expressly stated there are supported.