Activated Resorcinol in Day Cream: Usage and Photosensitivity
Question
Can Activated Resorcinol (4-Butyl Resorcinol) be used as a whitening agent in a Day Cream formulation? Does this ingredient cause skin photosensitivity?
Answer
Using Activated Resorcinol in Day Cream
Yes, Activated Resorcinol (4-Butyl Resorcinol) can be used as a whitening agent in a Day Cream formulation.
Usage Rate
For leave-on products like creams and gels, the recommended maximum usage rate for Activated Resorcinol is 1.0%.
Photosensitivity
Activated Resorcinol itself is light-sensitive, meaning the finished product should be protected from light (e.g., by using opaque packaging) to prevent discoloration of the formula. It does not typically cause skin photosensitivity in the same way some other ingredients might.
However, any ingredient that works by reducing melanin production, like Activated Resorcinol, can make the skin naturally less protected against UV radiation. Therefore, it is crucial to use a broad-spectrum sunscreen (SPF 30 or higher) daily when using products containing whitening agents like Activated Resorcinol. This protects your skin from sun damage and helps maintain the whitening results.
An alternative form is NanoRes, which is a liposome-encapsulated 4-Butyl Resorcinol that is water-soluble and developed for improved stability.