China: a bitter leaf becomes a materia medica
The oldest physical evidence is a grave. Plant remains from the tomb of Emperor Jing of Han, who died in 141 BCE, were identified as tea leaves in a 2016 study.
The earliest solid written reference is a household contract: Wang Bao's Tongyue of 59 BCE, whose list of a servant's duties includes boiling tea and buying tea at Wuyang. The famous origin story — the Divine Farmer Shennong, in 2737 BCE, watching leaves blow into his boiling water — is legend, attached to him long after the Han-era herbal bearing his name was compiled.
Tea's move from beverage to remedy is documented under the Tang. Lu Yu (733–804) wrote the Cha Jing, the Classic of Tea, in the 760s, treating tea partly as a cooling remedy for heat in the body. The Song emperor Huizong wrote his Daguan Chalun in 1107. Li Shizhen's Bencao Gangmu, printed in 1596, called tea cooling and good against drowsiness and headache — and warned it was harmful in excess. The caution is as old as the claim.
India: a herbal tradition much older than its tea
India's medicinal decoctions predate its tea drinking by a very long way. The Ayurvedic canon — the Charaka Samhita and the Sushruta Samhita, reaching roughly their present form in the early centuries CE — describes kashaya and kwatha, decoctions boiled from roots, barks, and leaves. Tulsi, ginger, turmeric, and licorice all appear.
None of that is tea. Camellia sinensis var. assamica grew wild in Assam, but its use was local. In 1823 the Scottish trader Robert Bruce was shown wild tea plants by Singpho people; the first Assam tea was auctioned in London in 1839. Mass tea drinking in India is largely a twentieth-century phenomenon, cultivated by an industry with a surplus to sell. Masala chai is a real fusion: an Ayurvedic spiced decoction wrapped around a colonial cash crop.
The Middle East: tisanes first, tea much later
Physicians of the Islamic world built the most systematic pharmacology of the medieval period. Al-Razi (c. 865–925) assembled the vast Kitab al-Hawi of case notes and remedies. Ibn Sina — Avicenna (c. 980–1037) — completed the Canon of Medicine in 1025, its second book cataloguing hundreds of simple drugs. Ibn al-Baitar (died 1248) compiled some 1,400 medicinal substances in his Compendium on Simple Medicaments and Foods.
The region's daily infusions — mint, anise, fennel, chamomile — belong to that tradition. Tea arrived late. Coffee reached Yemen and Sufi practice in the fifteenth century; Persia gained a serious tea culture only around 1900, when the diplomat Mohammad Mirza Kashef al-Saltaneh brought seedlings from India and planted them at Lahijan, in Gilan.
Europe: humors, monastery gardens, and the first advertisement
Pedanius Dioscorides, a Greek physician with the Roman army, wrote De Materia Medica around 50–70 CE, describing some 600 plants; it stayed the standard reference for roughly 1,500 years. Galen (129–c. 216) then sorted herbs by degrees of hot, cold, wet, and dry within his theory of the four humors — elegant, and almost entirely wrong.
Herbal knowledge survived in monastery gardens. Charlemagne's Capitulare de Villis, from the late eighth century, lists plants to be grown on imperial estates; Hildegard of Bingen (1098–1179) recorded her remedies in Physica. Then came the vernacular herbals: John Gerard's Herball (1597) and Nicholas Culpeper's The English Physitian (1652), which put the Latin pharmacopoeia into English — and folded in astrology, which did not help.
Tea reached Europe by ship, carried to Amsterdam by the Dutch East India Company by around 1610. The first known English newspaper advertisement for tea ran in Mercurius Politicus in September 1658, offering a "China Drink" that was "by all Physitians approved." In 1678 the Dutch physician Cornelis Bontekoe urged patients to drink dozens of cups a day. Marketing dressed as medicine is not new.
From herb to drug
The tradition earned its keep as a source of hypotheses. In 1763 the Reverend Edward Stone told the Royal Society that powdered willow bark relieved fever; Johann Buchner isolated salicin from it in 1828, and Bayer was marketing aspirin by 1899. In 1785 William Withering published An Account of the Foxglove, tracing a Shropshire folk cure for dropsy to one active plant — the origin of digoxin.
Both stories end in a laboratory, with a purified compound and a measured dose. That is the part of the tradition worth keeping: not the certainty, but the curiosity.
Last reviewed and updated . HelperTea is written by an enthusiast, not a clinician, and is not medically reviewed. How we research and rate evidence. Found an error? Tell us — safety corrections get priority.