5 INCI List Mistakes That Are Costing Your Skincare Brand Credibility Your INCI list is more than a regulatory requirement, it's the first thing educated consumers, retailers, and potential investors scrutinize when they pick up your product. And if it's wrong, it signals something far worse than a typo: it suggests your formulation process wasn't handled with care. After auditing dozens of skincare brands at various stages of development, we've identified five INCI list mist