Research principles
Each consequential factual statement should be traceable to a relevant source near the statement. We give priority to official clinical institutions for medical context and to direct merchant policy pages for commercial details. A sales-page assertion is not independent evidence of medical efficacy.
Primary reviewed sources
- VisiFlora seller's product page — seller descriptions, named ingredients, offers and directions.
- VisiFlora shipping policy — published destinations and fees.
- VisiFlora refund policy — seller's return requirements.
- VisiFlora affiliate terms — promotional compliance requirements.
- ClickBank return policy — retailer/platform refund context.
- National Eye Institute on AREDS2 — formula and studied populations.
- National Eye Institute AREDS FAQs — beta-carotene and trial interpretation.
- NCCIH on ginkgo and bilberry — safety and evidence context.
- NIH Office of Dietary Supplements on vitamin A — supplemental beta-carotene risk research.
- UK ASA/CAP supplement claims guidance — advertising limits for food supplements.
- Federal Trade Commission endorsement guides — disclosure principles.
Evidence gaps we disclose
No authenticated complete formula label direct from the manufacturer-facing source; no independent VisiFlora finished-product trial verified; no representative customer survey; no real UK checkout/tax confirmation. Readers should inspect official documents before purchasing.