This site states this directly in its own footer: it is an independent information resource for the Quiet Nerves supplement, not affiliated with or operated by the manufacturer.
Unlike a manufacturer's own official site, this site positions itself as a third-party informational resource — worth reading its reviews, comparisons, and claims with that distinction in mind, alongside its separate affiliate-commission disclosure.
An independent resource can offer a useful outside perspective, but it's also worth checking any specific factual claim against the official manufacturer page directly, since this site is explicitly not that official source.