Compatibility of Zinc PCA and Hi-EGCG

Thank you for your question regarding the compatibility of Zinc PCA and Hi-EGCG (Green Tea Extract) in your formulation.

Based on the product information provided for Zinc PCA, it is explicitly stated that it cannot be used together with Hi-EGCG. Mixing incompatible ingredients can potentially lead to reduced effectiveness of one or both ingredients, or cause stability issues within the formulation.

• Zinc PCA is beneficial for controlling skin oiliness, accelerating wound healing, stimulating collagen production, and has anti-dandruff properties.
• Hi-EGCG is a potent antioxidant that helps protect against sun damage, reduces acne by controlling oil production and inflammation, and improves skin elasticity.

Regarding the use of Hi-EGCG in a daytime formula, the product description notes that Hi-EGCG is very susceptible to light and the finished product should be protected from light, such as by using an opaque bottle, to maintain its effectiveness. While its antioxidant properties are beneficial for daytime protection, its light sensitivity suggests that it might be more stable and effective when used in a night formula or if the daytime product is carefully formulated and packaged to minimize light exposure.

Given the stated incompatibility of Zinc PCA and Hi-EGCG in the product information, it is generally not recommended to combine them in the same formula.