Western Herbal Traditions and Ancient Greek Medicine

What "Western herbal traditions" means

Western herbalism is not one unbroken system. It is a set of traditions in Europe and, later, the Americas. They draw on Greek and Roman medical writing, on local folk knowledge of plants, and on uses that Native peoples already knew. The echinacea plant is one example: Native Americans in North America used it for respiratory infections, tooth pain and snakebite. [1] Native nations hold their own plant knowledge, and this page does not describe it; see Indigenous and community traditions for how to approach it respectfully.

This page is the overview. Each part below has its own guide, listed at the end.

Greek roots and the humors

The US National Library of Medicine dates Classical Greece to about 800 BCE to 200 CE and says Greek medicine moved from divine and mystical explanations toward observation and logical reasoning. [2] In the humoral theory of health, four body fluids (blood, phlegm, yellow bile and black bile) were kept in balance, and illness came from imbalance, sometimes treated by reducing a humor through bloodletting or purging. [2] The Hippocratic Corpus has about sixty works by several authors, and the treatises sometimes give contradictory advice. [2] See Hippocratic medicine and the four humors and Galen and Galenic medicine.

Dioscorides of Anazarbus wrote De materia medica between about 50 and 70 CE. It was a five-book study of the preparation, properties and testing of drugs, and it became the central pharmacological work in Europe and the Middle East for sixteen centuries. [2] Greek medical knowledge also came back to Western Europe through Arabic manuscripts; the NLM notes that many Western Europeans first relearned Greek medicine from works such as a thirteenth-century Arabic text on Hippocrates. [2] The same Greek framework also underlies Unani medicine.

From manuscripts to modern practice

After the fall of the Roman Empire in the 5th century, most works of the Greek physicians were lost to Western Europe, and they were rediscovered in the 14th and 15th centuries. [2] English printed herbals followed. Nicholas Culpeper's 1652 English Physitian was a bestseller, but a 2024 study argues that much of it was borrowed from the apothecary John Parkinson. [3] The full story is in the history of Western herbalism.

In the United Kingdom, a body of medical herbalists was first conceived in 1864 and became the National Institute of Medical Herbalists in 1954. [4] In the United States, the American Herbalists Guild describes clinical herbalism as a profession it promotes. [5]

Ideas herbalists use, and how to read them

Modern Western herbalists often describe plants by their "energetics" (warming, cooling, drying, moistening) and by "actions" such as astringent or demulcent. These are traditional vocabularies, not measured biology. They are explained in herbal energetics and herbal actions and materia medica terms. One group of plants, the bitter herbs, is covered in bitter herbs and digestive bitters.

What research shows for specific herbs

Humoral theory is a historical framework, not a biomedical mechanism, and no clinical test of the humors as a system was found in the sources we read. Individual herbs are judged on their own trials.

St. John's wort shows why "traditional" does not mean "safe with your medicines." NCCIH says it can interact in dangerous, sometimes life-threatening ways with many medicines. [6] Read St. John's wort interactions and the St. John's wort and echinacea profiles.

Who should seek conventional care first

Talk to a clinician or pharmacist first if you take prescription medicines, are pregnant, have liver or kidney disease, or have symptoms that do not go away or keep coming back. [8] Do not stop a prescribed medicine for a herb.

Related pages

Browse herbs and botanicals, herbal teas, historical use vs clinical evidence and the Doctrine of Signatures.