Extraforte Serum for Tonifying in Vials 10 vials Serum in vials for ionophoresis and a massage basis. It contains: collagen, elastine, wild brier, old man's beard (Equisetum arvense), mucopolysaccharides. It restores the solideness and tonus of the epidermis. Apply one vial over both electrodes: positive and negative. Follow the timing and intensity prescribed by the device's manufacturer. Finish the treatment with a few minutes before the changing of the electrodes polarity. One applies it before massage.