Undecylenoyl Phenylalanine ek synthetic amino acid derivative hai jo hyperpigmentation ko kam karne ke liye use hota hai. Yeh melanocyte receptors par kam karata hai aur melanin ke production ko rukta hai. Isse dark spots aur uneven skin tone kam hone mein madad milta hai. Regular use se face par brightness aati hai aur complexion zyada even lagta hai.