Every article in this encyclopaedia cites the Huangdi Neijing (黄帝内经), the “Yellow Emperor’s Inner Classic”, sooner or later. Compiled between the third and first centuries BCE, more than 2,200 years ago, it is the text that fixed the vocabulary, the physiology and the clinical logic of all Chinese medicine. Neither Qi, nor Yin-Yang applied to the body, nor dietetics can be understood without knowing where they come from. Yet what makes this classic remarkable is not its age: it is that it remains a book of practical counsel, whose teachings on food have not aged a day.
Suwen and Lingshu: the two halves of the classic
The Huangdi Neijing is not one book but two, brought together late under a single title:
- The Suwen (素问, “Basic Questions”): 81 chapters of dialogue between the Yellow Emperor and his master Qi Bo. This is the theoretical half: bodily cosmology, Yin-Yang, the Five Phases, the organ systems, the causes of disease, and the oldest layer of Chinese dietetics.
- The Lingshu (灵枢, “Spiritual Pivot”): 81 further chapters, more technical, centred on the meridians and acupuncture.
The dialogue is a literary convention: the Emperor asks a naïve question, Qi Bo answers at length. Far from being ornament, this format says something about the text: Chinese medicine was born as oral teaching set down in writing, meant to be transmitted and commented on, not read as a fixed treatise.
Food as primary prevention
The Suwen places dietetics where Western medicine only put it in the twentieth century: at the front rank of interventions. Its most cited principle (chapter 70) ranks treatments: violent remedies treat six parts in ten of a disease, moderate remedies seven, gentle remedies eight, and foods treat the remainder, all the way through. In other words: the gentler the intervention, the further it can go without harm. Food is the treatment that can last a lifetime.
“The five grains nourish, the five fruits assist, the five meats strengthen, the five vegetables fill the gaps.”
This verse from chapter 22 sets out the first known food pyramid: cereals as the nourishing base, fruits as support, meats as a measured reinforcement, vegetables as the complement that “fills the hollows”. Twenty-two centuries before modern guidelines, the structure is already that of a plant-and-grain-led diet in which meat is a tonic, not a foundation.
The five flavours and the five organs: the first dietary system
The Suwen establishes the correspondence that still structures every food card in this encyclopaedia: each flavour relates to an organ and an action.
- Sour (酸) → Liver: gathers, contracts, retains
- Bitter (苦) → Heart: descends, dries, purifies
- Sweet (甘) → Spleen: tonifies, harmonises, relaxes
- Pungent (辛) → Lung: disperses, circulates, opens
- Salty (咸) → Kidney: softens, descends, gently purges
The same chapter states the corollary: excess of a flavour injures its associated organ. Sweet in excess engorges the Spleen and breeds Dampness; salt in excess injures the Kidney and the Blood. This symmetry, “the flavour nourishes then wounds”, is the earliest statement of a toxicology of dosage: there is no good flavour, only a right measure.
Digestion as transformation: the basis of the Spleen-Stomach model
The Suwen describes digestion in terms any reader of this encyclopaedia will recognise: the Stomach “receives and breaks down”, the Spleen “transforms and transports”, the Clear rises towards the Lung and heart, the Turbid descends towards the intestines. Eating is not absorbing nutrients: it is feeding a transformation plant its raw material, and the quality of the product depends as much on the machinery (the terrain) as on the material (the food).
Three practical consequences follow, made explicit elsewhere in the text: eat at regular hours (the Spleen likes rhythm), moderate quantity (“food that doubles capacity injures the organ”), and match raw and cooked to the digestive strength of the moment.
How to read a 2,200-year-old classic without going wrong
Three precautions for the modern reader.
The text is composite. The Neijing was not written by one hand or even one generation: it is a compilation of oral traditions set down over several centuries, then interpolated across dynasties. Its internal contradictions (two passages saying opposite things) are not scandals but the trace of different schools.
Translation is interpretation. The reference English translations (Unschuld, Wiseman) and the French ones diverge on crucial points: rendering 精 as “essence”, “semen” or “refinement” changes the physiology. When an article cites the Neijing, it cites a reading.
The classic is not a protocol. The Suwen lays down principles (flavours, seasons, moderation), not gram-precise prescriptions. Reading the Neijing as a modern dietetics manual would make it say what it does not: it teaches a way of thinking about food, and that is precisely the way the Yin Shi encyclopaedia applies to today’s foods.
FAQ
Who wrote the Huangdi Neijing?
No one in particular, and certainly not the Yellow Emperor, a semi-legendary figure. The text is a compilation of oral and written medical traditions, fixed between the third and first centuries BCE and reworked under later dynasties. Wang Bing, in the eighth century, gave it its present form.
Does the Neijing really discuss food?
Yes, and centrally: the Suwen devotes entire chapters to flavours, seasons and the grain-fruit-meat-vegetable hierarchy. Dietetics is no marginal subject in it: it is the first layer of treatment, ahead of herbs and needles. Sun Simiao and the whole 食疗 current are its direct heirs.
Which translation should I start with?
For English readers, Paul Unschuld’s edition of the Suwen is the most rigorous critical translation, and Nina Wiseman’s the standard for the Lingshu. Each is a reading, not a photograph of the text.
Is the Neijing still clinically useful?
Its physiology (functional organs, cycles, directions of Qi) remains the ground on which every TCM practitioner reasons. Its dietary counsel, moderation, rhythm, seasonality, the gentle-versus-harsh ratio of interventions, has been borne out in spirit by modern nutrition. Its anatomy, though, belongs to a functional model: it is not to be read as an atlas.
A classic still in service
The Huangdi Neijing is not a monument to visit: it is a tool still in use. Its teachings on food (the five flavours, the hierarchy of foods, seasonality, moderation) form the ground on which every card in this encyclopaedia is built. To go further: the overview of TCM places the classic within the whole system, and the Yin-Yang plate guide puts its principles into practice tonight.
To go further
Yin Shi ecosystem resources directly related to this article.