Donkey milk knowledge archive · Historical source

Li Shizhen, Bencao gangmu (1578): donkey milk in the great Chinese materia medica

The Bencao gangmu, completed in 1578 by the physician Li Shizhen, devotes a subsection of its own to donkey milk, describing it as sweet, cold and laxative. The work also records that donkey milk cannot be made into soured milk.

Historical account: The information reproduced here reflects the knowledge of its time. It is not scientifically substantiated, is not a recommendation and cannot be applied to today. Donkey milk is a food, not a remedy.
1578China (Qizhou, Hubei province; printed in Jinling/Nanjing)Materia medica
Author
Li Shizhen (1518–1593)
Work
Bencao gangmu (本草綱目, “Systematic Materia Medica”), 52 chapters; quoted after the Siku quanshu copy, checked against the Jinling first printing
Passage
Chapter 50 (animals, domestic animals), entry “Donkey” (驢), subsection “Milk” (乳); plus the entry “Soured milk” (酪), section of explanations
Time & place
completed 1578; first printed in Jinling (preface 1590) · China (Qizhou, Hubei province; printed in Jinling/Nanjing)
Type of source
Materia medica

In the original words

What the original says

乳氣味甘冷利無毒〈思邈曰酸寒〉

Milk [of the she-ass]. Flavour and nature: sweet, cold, “flowing” (laxative), non-toxic. [Note:] Sun Simiao says: sour, cold.

Classical ChineseLi Shizhen, Bencao gangmu, Kap. 50 (Haustiere), Eintrag „Esel“ (驢), Unterabschnitt „Milch“; Text nach der Siku-quanshu-Ausgabe (卷50下)

小兒熱急黄多服使利〈唐本〉療大熱止消渴〈孫思邈〉

[Uses according to the quoted sources:] for heat and acute jaundice in children; taken in quantity it purges (Tang materia medica). Treats great heat and stops “wasting-thirst” (Sun Simiao).

Classical ChineseLi Shizhen, Bencao gangmu, Kap. 50, Eintrag „Esel“, „Milch“, Abschnitt Indikationen (主治); Siku-quanshu-Ausgabe

驢乳尤冷不堪作酪也

Donkey milk is especially cold and is not fit for making soured milk (lao).

Classical ChineseLi Shizhen, Bencao gangmu, Kap. 50, Eintrag „Sauermilch“ (酪), Erläuterungen (集解), Zitat des Su Gong; Siku-quanshu-Ausgabe

English rendering: our own translation by the DON DONKEY’S editorial team, following the sense of the text.

Digitised copy · 1578Double page from chapter 50 of the Jinling first edition of the Bencao gangmu (preface 1590); on the right the subsection “Milk” (乳) in the entry “Donkey”.

A look at the original

What the passage looks like

Double page from chapter 50 of the Jinling first edition of the Bencao gangmu (preface 1590); on the right the subsection “Milk” (乳) in the entry “Donkey”.

The page comes from a freely accessible digitised copy. Click to open the passage at the library.
National Diet Library (Tokio), via Wikimedia Commons; gemeinfrei

View in the digitised copy →

Background

Who, when, what kind of text

Li Shizhen worked on his materia medica for almost three decades and completed it in 1578; it was printed only shortly before or after his death, in Jinling, today’s Nanjing. Its 52 chapters describe some 1,900 drugs from plants, animals and minerals and are regarded as the high point of the Chinese materia medica tradition.

Each entry follows a fixed scheme: names, explanations, then for each part of the animal or plant its flavour and nature, indications and recipes. Li Shizhen almost always quotes older works and names them, such as the Tang materia medica of 659 or the physician Sun Simiao. The animal chapters 50 and 51 begin with the domestic animals; the donkey comes after cattle and horse.

Content

What the source reports about donkey milk

In the entry “Donkey”, Li Shizhen deals in turn with meat, fat, marrow, blood, milk, hide, hair and other parts. For the milk he gives the qualities sweet, cold and “flowing”, that is laxative, and non-toxic; Sun Simiao, by contrast, had described it as sour and cold.

The indications come from several older sources: heat and acute jaundice in children, great heat, “wasting-thirst”, acute convulsions, dysentery and fits in children and, drunk hot, heart pain. Recipes follow, among them mixtures of donkey and pig milk for children. Donkey milk is not a substitute for breast milk or infant formula; infant feeding belongs in medical hands.

A practical observation appears in the entry “Soured milk”: there Li Shizhen quotes the Tang scholar Su Gong, according to whom the milk of, among others, cattle, sheep, water buffalo and horses can be made into soured milk, whereas donkey milk is especially cold and unsuitable for it.

At a glance

Figures & facts from the source

1578completion of the manuscript by Li Shizhen
52chapters of the Bencao gangmu
ch. 50domestic animals; entry “Donkey” with subsection “Milk”
甘 · 冷 · 利sweet, cold, laxative: the qualities of donkey milk
659Tang materia medica, source of the oldest quoted indication

Timeline

Where this source stands in the history of donkey milk

Each dot is a source from our knowledge archive – from Greek antiquity to the present day.

1578400 BC050010001500170018001900today

Critical assessment

How reliable is this source?

Source value

The Bencao gangmu is the most influential pre-modern materia medica of China. We quote the clearly legible 18th-century Siku quanshu copy and have checked the passage against the scan of the Jinling first printing, which has the same text.

Quotations from older authors

Most statements on donkey milk are taken by Li Shizhen from works of the 7th to 10th centuries, with the source named in brackets each time. Terms such as “cold” or “flowing” belong to the Chinese doctrine of drug natures and do not refer to temperature.

Today’s assessment

The indications belong to medical history and are not health claims valid today. The references to children are historical; donkey milk is not a substitute for breast milk or infant formula, infant feeding belongs in medical hands.

Our assessment

The passage shows that donkey milk had a firm place not only in European and Arabic medicine but also in Chinese pharmacology. Especially vivid is the practical note that it cannot be made into soured milk.

References

Sources to check

More sources and studies in the research archive. Summarised by the DON DONKEY’S editorial team, as of November 2026.