Applications AS1 nutrient solution can be used on all skin types SA2 is for sensitive skin AO3 for skin that needs nutrition or moisture The three nutrient solutions can be used in combination So no matter what skin it belongs to, it can be used. Advantages 1)  Minimizing skin pores 2) Raising skin resistivity and keep the elasticity of skin 3) Help calming of atopic skin 4) The reduction of inflammation and edema Size AS1 400ml SA2 400ml AO3 400ml Treatment Effect Certification and Exhibition European service center We have an office located in Germany to provide good customer service for European clients. Training, visiting, experiencing, after-sale service are all available. We have an office located in Germany to provide good customer service for European clients. Training, visiting, experiencing, after-sale service are all available. We can offer you good German local service at a Chinese low price!