Formulating for Combination & Sensitive Skin with Pitera and Vitamin C

Thank you for providing detailed information about your skin condition. It sounds like you have combination skin that reacts to weather changes, along with sensitivity due to allergies/low immunity.

Formulating skincare for skin that varies between oily and dry, and is also sensitive, requires careful consideration. As previously mentioned, it's generally not recommended to mix ingredients like Pitera directly into a pre-made serum like Stabilized Vitamin C (Natural-C Glycol™) Serum, as this can affect its stability and effectiveness.

It would be better to create separate formulations tailored to your skin's needs. Since you are new to formulating, starting with simpler recipes is a good approach.

We can explore ingredients and formulation types that can help balance your skin (addressing both oiliness and dryness), soothe sensitivity, and potentially help with pore appearance. Pitera (Galactomyces Ferment Filtrate) can be a great base for a hydrating and balancing serum, as suggested earlier.

Would you like me to provide more information about Pitera or suggest other ingredients and basic formulation types suitable for your skin concerns?