Every specific research claim on this site is checked against a verifiable source — a peer-reviewed study, a government health agency (such as the National Eye Institute), or a registered clinical trial. Where a claim commonly appears in supplement marketing but cannot be independently verified — specific statistics, historical anecdotes, or institutional attributions — we flag it explicitly as unverified or leave it out entirely rather than repeat it as fact.
We rank sources by strength rather than treating everything as equally credible: large randomized controlled trials and government research bodies rank highest, followed by smaller randomized trials, then systematic and narrative reviews, then mechanistic/preclinical research, with unreferenced marketing claims ranked lowest. See our full Research Library for this framework in detail.
This site contains affiliate links to our official ordering partner, disclosed in our Disclaimer. Our content — including any limitations or cautions we note about the formula — is written to the same evidence standard regardless of that relationship. Where evidence is mixed or limited, such as with the gut-eye connection or certain ginkgo biloba studies, we say so directly.
If you believe something on this site is inaccurate or outdated, contact support@visiflora.com with the specific page and claim, and we will review it.