Plant-based supplements can look clean on the front and still hide...

https://oscar-wiki.win/index.php/Can_a_Gluten-Free_Supplement_Still_Have_Cross-Contamination%3F

Plant-based supplements can look clean on the front and still hide animal-derived capsule ingredients or vague sourcing. This label-check guide shows you what to scan for, from HPMC and pullulan capsules to the 20 ppm gluten-free threshold