A supplement can look plant-based and still hide an animal-derived capsule...

https://smart-wiki.win/index.php/How_to_Avoid_Gelatin_When_Buying_Omega-3_Supplements_as_a_Vegan

A supplement can look plant-based and still hide an animal-derived capsule shell. Learn how to spot gelatin versus HPMC, why “vegan” has no federally set definition, and what a credible third-party mark can—and can’t—tell you