Why should you wash your hair with Thymuskin Shampoo before applying Thymuskin Serum?

Thymuskin Cleansing & Conditioning Shampoo optimally prepares the scalp to absorb Thymuskin Serum and removes accumulated dirt particles. The GKL–02 Thymic Peptide Complex it contains nourishes the scalp in advance, ensuring that the Thymuskin Serum applied afterward is as effective as possible.