
Restricted Category AI Visibility Index 2026: Refusal Rates, Hedge Patterns, and the Categories AI Won't Answer
How AI engines handle adult, wellness, creator, and regulated commercial categories. The Naming Threshold, the Wellness Passport, the Source Quality Hierarchy, and the New Discovery Stack — five findings that reshape restricted-category retrieval across ChatGPT, Claude, Perplexity, and Google AI Overviews.









