Verifying Real Ginseng, Against the Classics

Verifying Real Ginseng, Against the Classics

The classics were already worried about fakes

Ginseng (ren shen) has been valuable, and therefore counterfeited, for a very long time. What is striking is that the classical materia medica did not just list ginseng and move on — it recorded, in concrete detail, how to tell the real root from the ones sold in its place. Centuries before any laboratory assay, the texts were already doing verification.

This article transcribes those identifying lines, each traced to its source. It is a record of how the classics described telling real ginseng from false — a demonstration of what source-traceability looks like when you point it at a single herb. It is not a buying guide, it makes no claim about what ginseng does, and it carries no dosage. The point is narrower: what did the texts say to look at, and can you check the quote?

First, where it came from

The earliest layer of the record is about provenance (dao di, "authentic origin"). Tao Hongjing, quoted in the Bencao Gangmu, ranks the sources by region and even describes what each looks like:

上黨在冀州西南，今來者形長而黃，狀如防風，多潤實而甘。俗乃重百濟者，形細而堅白…次用高麗者…形大而虛軟，不及百濟，並不及上黨者。

That is: Shangdang ginseng (from present-day Shanxi) is "long and yellow, shaped like fang feng, moist, solid and sweet"; Baekje ginseng is "slender, firm and white"; Goryeo ginseng is "large but hollow and soft" — and, in his ranking, none surpasses Shangdang. Whatever one makes of the ranking, notice the method: the text is teaching you to read origin off the root itself — its length, color, density, taste.

Then, its shape — and its name

The Mingyi Bielu, opening the Bencao Gangmu's 集解 (collected explanations), gives the morphological tell that became ginseng's signature:

根如人形者，有神。

"A root shaped like a human figure has spirit." Li Shizhen turns this into the etymology of the name itself: the root, growing for years, "gradually takes on a human form" (根如人形), which is why it is called ren shen (人薓) and shen cao (神草), the "spirit herb." The aliases the text lists — 黃參 (yellow shen), 血參, 神草, 土精, 地精 — are not decoration either; each encodes a claim about the plant (its yellow color, its earthy provenance) that a reader could check against the root in hand.

The heart of it: the cut and the taste

Here is the passage that makes ginseng a perfect case for source-traceability. In the 集解, Li Shizhen names the three roots most often passed off as ginseng — sha shen (adenophora), ji ni, and jie geng (platycodon) — and gives a test that turns on two things: whether the root has a core (心) and how it tastes (味):

偽者，皆以沙參、薺苨、桔梗采根造作亂之。沙參，體虛無心而味淡；薺苨，體虛無心；桔梗，體堅有心而味苦；人參，體實有心而味甘，微帶苦，自有餘味，俗名金井玉闌也。

Read it as the identification key it is:

• Sha shen — hollow body, no core, bland taste.
• Ji ni — hollow body, no core.
• Jie geng — solid body, has a core, but bitter.
• Genuine ginseng — solid body, has a core, sweet with a slight bitter aftertaste and a lingering finish — nicknamed 金井玉闌 ("golden well, jade railing"), for the ring of yellow cortex around a pale core you see when you cut it across.

That is a repeatable, checkable procedure written in the sixteenth century: cut the root, look for the pale core inside the yellow ring, taste for the sweet-then-bitter finish. It does not depend on trusting a label. It depends on the root telling you what it is.

When even the classic picture-book got it wrong

And now the line that is almost too good. Li Shizhen goes on to check the illustrations in Su Song's Tujing Bencao (the great illustrated herbal) — and finds that some of its "ginseng" drawings are not ginseng at all:

蘇頌《圖經本草》所繪潞州者，三椏五葉，真人參也；其滁州者，乃沙參之苗葉；沁州、兗州者，皆薺苨之苗葉。

Only the Luzhou drawing — three prongs, five leaves — is real ginseng, he says; the Chuzhou one is actually the shoot-and-leaf of sha shen, and the Qinzhou and Yanzhou ones are ji ni. In other words: even a classical authority's own picture book had substitutes printed under the name "ginseng," and it took a later authority, reading carefully, to catch it and say which was which.

That is exactly what source-traceability is about — not that old sources are always right, but that when each claim is pinned to who said it, a later reader can trace the error and correct it in the open, without erasing the original.

A transmitted curiosity: the "walking test"

For completeness, the Bencao Gangmu also records a folk test, and it is careful to frame it as hearsay ("相傳," it is handed down that):

相傳欲試上黨參，但使二人同走，一含人參，一空口，度走三、五里許，其不含人參者，必大喘；含者氣息自如，其人參乃真也。

Two people walk several li; one holds ginseng in the mouth, one does not — and the root is judged genuine if the one holding it is less winded. We transcribe it as what it is: a transmitted saying, marked as such in the text, not a verified method and not a claim about what ginseng does. It survives here as a record of how far the tradition went to authenticate the root — kept, flagged, and traced, rather than smoothed into fact or quietly dropped.

Even the flavor line disagrees with itself

One last detail, because it is the same lesson in miniature. The nature-and-flavor line for ginseng is not single-voiced:

甘，微寒，無毒。（《本經》）／ 微溫。（《別錄》）

The Shennong Bencao Jing calls it "sweet, slightly cold"; the Mingyi Bielu calls it "slightly warm." Two of the oldest authorities, on the most basic property, do not agree — and a later voice (Zhang Yuansu) adds a third reading ("warm, sweet and slightly bitter"). We keep all three, each with its source, exactly as we do for cinnabar — because flattening "slightly cold / slightly warm" into one tidy word would hide that the record was contested from the start.

How MateriaTrace handles it: every identifying line traced

So "verifying ginseng" in the classics is really a stack of specific, checkable records:

1. provenance — Shangdang vs Baekje vs Goryeo, read off the root's shape, color, density;
2. morphology — the human-form root, three prongs and five leaves;
3. the cut-and-taste key — core vs no core, sweet vs bland vs bitter, 金井玉闌;
4. a worked correction — Su Song's illustrations, some of them substitutes, caught by Li Shizhen;
5. a flagged folk test — the walking test, marked as hearsay.

Here is how we hold that: each line is kept verbatim, attributed to the authority who said it (《本經》, 弘景, 時珍, 《圖經》), placed in its section of the Bencao Gangmu, and traced to the source. Where the authorities disagree — slightly cold vs slightly warm — we keep the disagreement visible. We add no modern verdict on what ginseng is or does; we record how the classics described recognizing it.

Worth stating plainly: this is a record of how classical texts described distinguishing genuine ginseng from substitutes, kept for study and traceability. It is not advice on buying, using, or dosing any herb, and it makes no claim about ginseng's effects. MateriaTrace records what sources say and makes no treatment recommendation; any question about a herb belongs with a qualified professional.

Why this is what source-traceability is for

It would be easy to write one line — "real ginseng is sweet; fakes are bitter" — and be done. But that line would throw away everything the classics actually built: a provenance ranking you can read off a root, a cross-section test with a name, and a documented case of a great herbal getting its own pictures wrong. Those survive only if the exact lines survive, each attributed, each traceable — so that you can do what Li Shizhen did to Su Song, and check.

See the roots themselves: ginseng (ren shen), and the two the classics named as substitutes — platycodon (jie geng) (under which the old name ji ni is recorded) and adenophora (sha shen). For how we treat a record when the sources themselves disagree, read about cinnabar and mercury; for how we keep a classical line beside a very different modern reading, read about ma dou ling and aristolochic acid.

If this "every line clicks back to its own source" approach is useful to you, see what else is in MateriaTrace on the homepage.

MateriaTrace is a source-traceable, bilingual knowledge graph of Chinese medicine. It records how classical and modern sources describe each entry — each field traceable to its primary source, contradictions kept side by side — and makes no treatment or usage recommendations. Every line quoted in this article can be traced to its classical source.