Yiwei Soup

which was first published in Detailed Analysis of Epidemic Warm Diseases

consists of shashen

maidong

xishengdi

yuzhu（fried）

and rock sugar

and has the effect of nourishing yin and benefiting the stomach and intestines.It is commonly used clinically for the treatment of chronic gastritis with stomach yin deficiency

Diabetes mellitus

and anorexia nervosa in children.In modern times

shashen in the formula is divided into northern and southern shashen

and it is worth exploring which is more reasonable to be included in the decoction.Therefore

in this study

the botanical origin

nature and taste

modern pharmacology

and clinical application of northern and southern shashen were investigateD.The results showed that northern shashen is suitable for use in Yiwei Soup.