SPF Booster
SPF Booster — an ingredient added to a sunscreen formulation that increases the measured sun protection factor without itself being a licensed UV filter. These additives improve protection by enhancing film formation, stabilizing filters, or scattering light, allowing a product to reach a higher SPF more efficiently.
Key points
- SPF boosters raise a formula's SPF by improving how UV filters perform rather than by filtering UV directly.
- They can work by enhancing the uniformity of the sunscreen film, boosting photostability, or adding light-scattering particles.
- Using boosters can help formulators achieve target SPF values with lower total concentrations of active filters.
- Boosters do not replace UV filters and are only effective as part of a complete, properly tested sunscreen.
Frequently asked
Is an SPF booster a sunscreen active?
No, an SPF booster is not a regulated UV filter; it enhances the performance of the actual filters so the finished product achieves a higher SPF.
How do formulators know a booster actually raises SPF?
The finished product's SPF must be confirmed through standardized testing, since boosters only add value when validated within the complete formulation.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
