Overview
- The BMJ synthesis reports that influencer health advice can drive harmful choices, citing posts pushing whole‑body MRI scans and unproven COVID‑19 treatments.
- In Austria, 83% of 15–25‑year‑olds encountered influencer health content, with about one third buying supplements, 13% purchasing medications and 11% using self‑tests after viewing.
- Evidence shows promotion dominates risk disclosure: 87% of posts about commercial medical tests highlighted benefits, while many supplement dose tips exceeded national safety levels and 7% surpassed EFSA maximums.
- The authors identify four bias drivers—limited medical expertise, industry influence, commercial self‑interest and personal beliefs—amplified by parasocial bonds and opaque, personalized algorithms.
- The study calls for tougher regulation, stronger platform accountability, transparent sponsorships and user education, noting models such as the EU Digital Services Act and measures adopted in Italy and France.