Help check serum formula. Intended for discount สิวอุดตัน using Willow Bark Extract instead of salicylic. Please check what to add. Or are there any substances that should not be used together? น้ำกลั่น 50g Vit5 Panthenol extralite 3g vit 3 Niacinamide 5g Zinc PCA 7g Willow Bark Extract 7g Mild Pres...
