薯蓣,又名山薯、淮山药、怀山药等,为薯蓣科植物薯蓣的根茎。该品具有食用和药用的双重价值,在历代本草中都被列为补虚佳品。山药最早见于《山海经》,名署预。《神农本草经》将其列为上品,称其“主伤中,补虚羸,除寒热邪气,补中益气力,长肌肉。久服耳目聪明”。《名医别录》称山药“主治面游风,风头、眼眩,下气,止腰痛,补虚劳羸瘦,充五脏,除烦热,强阴”。《新修本草》赞扬“署预,晒干捣细,筛为粉, Dioscorea nippon, also known as potato, yam and yam, such as yam, for the Dioscorea dioscorea rhizome. The product has the dual value of food and medicine, in ancient times have been listed as herbs tonic Jiapin. Yam first seen in ”Shan Hai Jing“, prestige prestige. ”Shen Nong’s Herbal Classic“ will be classified as top grade, saying that ”the main injury, tonic 羸, in addition to hot and cold evil, Bu Zhongyi strength, long muscles. “Famous doctors do not record,” said yam “attending physique travel style, limelight, dizzy, down the gas, only low back pain, tonic labor 羸 thin, filling five dirty, in addition annoying fever, strong Yin.” “New Materia Medica” praised "Department of pre-drying, pounding, sieve powder,