Day: 19 August, 2026

Why Does a Cosmetic Formula Discolor Inside the Bottle?

Direct answer: A cosmetic usually discolors because ingredients are oxidizing, reacting to light or heat, shifting with pH, interacting with trace metals, degrading together, or supporting microbial growth. Packaging can accelerate or reveal the change when it admits oxygen/light, loses volatile components, releases migrants, adsorbs ingredients or exposes the formula to reactive pump and seal […]