For skincare brands building products for hyper-reactive skin, the biggest formulation challenge is often not the hero active.
It is the preservation system.
Barrier repair products are usually expected to calm, protect, and simplify the routine for skin that is already irritated, compromised, or unusually sensitive.
That sounds straightforward until a product team reaches the point where safety, tolerance, shelf stability, and packaging all start pulling in different directions.
A multi-use product needs a preservation strategy.
But the very ingredients used to keep that product safe in repeated-open packaging can also become part of the irritation problem for the end user.