1. Compared to water-soluble prototype vitamin C, the oil-soluble VC-IP offers better skin penetration, greater stability, and milder effects.

2. VC-IP can continuously convert into vitamin C within the skin, with a transdermal conversion efficiency as high as 84% after 10 minutes. It provides antioxidant protection, photoprotection, inhibits melanin formation, and promotes collagen synthesis.

3. It is recommended to formulate VC-IP with chelating agents (such as disodium EDTA) and antioxidants (such as tocopherols), and to keep the formulation pH below 5.5.

4. During processing, avoid prolonged high-temperature heating. It is recommended to add VC-IP below 45°C and use low-temperature homogenization and stirring.

5. Suitable for emulsified systems such as creams, lotions, and emulsions, as well as fully oil-based systems like facial oils.

6. Recommended usage concentration: 0.1% to 3.0%. Actual usage can be flexibly adjusted based on the product type and formulation cost requirements. The maximum safe concentrations are approximately 35% for creams and facial lotions/serums, 19% for masks, and 7% for body lotions.