Duo Digest: What Makes a Good Skincare Formula “Stable”?
You’ve seen the phrase “stable formula” on everything from serums to sunscreens. But what does it actually mean—and why does it matter?
1. Stability = Safety + Performance
A stable formula keeps its texture, pH, and active ingredient strength over time. Unstable products can oxidise (think of vitamin C turning orange), degrade, or become less effective long before the expiry date.
2. How to Spot a Well-Formulated Product
- Opaque or airless packaging that protects light- and air-sensitive ingredients
- Consistent texture and no separation over time
- Clear shelf life and ingredient compatibility (no ingredient clashes inside the bottle)
At DuoGen, our focus isn’t just “trendy” actives—it’s ensuring they stay active. Because even the best ingredients mean nothing if they break down before reaching your skin.
