DALLAS Biotin Thickening TreatmentOur mega thickening treatment helps build texture for a long lasting, voluminous effect. It fortifies hair without weight, delivering instantaneous, visible results in minutes. Claims: Visible results after one application*: Increased thickness + volume: fiber diameter +1% Reduced split ends + flyaways through 10 washes *Clinical tests conducted on chemically treated hair, exposed to extreme damaging conditions of bleaching, washing, blow drying and