How to Layer Serums Without Pilling

Pilling is rarely your skin rejecting actives. It is usually too much product, wrong order, or rubbing before water-based layers dry.

The order that works

1. Toner / essence — watery, press in
2. Treatment serums — vitamin C, niacinamide, peptides
3. Occlusive cream — seal
4. SPF — mornings only, last step before makeup

If two serums fight (silicone-heavy over sticky hyaluronic), apply the thinner one first or alternate AM/PM. Less is almost always more in humid cities.