Adding Activated Resorcinol to Water-Based Products and Using with Vitamin C Serum

Regarding adding Activated Resorcinol to your Hada Labo product:

Activated Resorcinol is not soluble in water. To incorporate it into a water-based product like Hada Labo, you need to first dissolve it in an oil phase. You can use an emollient oil like LipidSoft for this purpose. Once dissolved in the oil, you can then use a solubilizer like Flora Solve Clear to disperse this oil mixture into the water-based product. This two-step process helps ensure the Activated Resorcinol is properly incorporated and stable in the final formulation.

Regarding using L-ascorbic acid serum after applying the Hada Labo with Activated Resorcinol:

Yes, you can generally use a serum containing Vitamin C (L-ascorbic acid) after applying a product with Activated Resorcinol. However, both Activated Resorcinol and L-ascorbic acid are potent active ingredients, and using them together might increase the potential for skin irritation, especially if you have sensitive skin or are using high concentrations of both. L-ascorbic acid serums typically have a low pH, which could also potentially affect the stability or efficacy of Activated Resorcinol (which works best at a slightly higher pH) or cause irritation when layered.

It is recommended to observe your skin's reaction carefully. If you experience any redness, dryness, peeling, or discomfort, you should reduce the frequency of application for one or both products, or stop using them together. There is no strict rule on how long to wait between applications, but allowing the first product to fully absorb before applying the next might help minimize potential interactions or irritation.