Findings are drawn from 27,812 AI-generated answers across ChatGPT, Gemini, Perplexity, and Claude in response to real healthcare search and recommendation prompts collected in June 2026. Brands were extracted from the assistants’ answer text, not from a preset list. Rankings and percentages are directional, based on raw mention counts across assistant responses. Research by Yolando. Cite as: Yolando Research, June 2026.