Svensonˇ¦s application of high-efficiency soft laser in dealing with hair loss problems has been highly appraised by the international trichology institutes such as the Asia Society of Trichology (AST). The trichologists of Svenson adopt 780nm soft laser with moderate energy, which may penetrate into the adipose layer, where the deepest part of hair follicles and hair roots are, accurately and rapidly removing toxin and other harmful substances damaging the growth of hair, accelerate blood circulation, enhance oxygen and nutrition supply to the hair roots and promote the self-repairing function, normal action and operation of hair cells.