Anua Azelaic Acid 10% Hyaluron Redness Soothing Serum (reformulated).

What the gurus are saying

This reformulation swaps the original azelaic acid for a salt form at higher pH, and the shift raises serious concerns. Mad About Skin found no data supporting the salt form's effectiveness and worries it may be far less bioavailable than the original, while Anua's decision to hide the reformulation until a cosmetic formulator exposed it suggests the brand itself may not stand behind the change. AliceintheRabbitHole experienced a severe reaction after applying it generously one night, though she believes it genuinely contains 10% azelaic acid, just in a format that proved too strong for her skin. The lack of transparency and unproven efficacy make this a firm skip for those who relied on the original formula.