Est. 1956 · The Order The independent guide to oolong: the partly oxidized teas, and how to brew them Oolong.biz
THE ORDER OF THE SEVENTH STEEP SEMPER PARTIM OXIDATUM OOLONGThe Order of the Seventh Steep
The Order of the Seventh Steep
OOLONG
Semper Partim Oxidatum Always partly oxidized

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Article · Health & Science

A Guangdong Oolong Extract Changed How Mice Handle Drugs

In a week-long Guangzhou mouse study, a hot-water extract of Baiyedancong oolong raised liver and gut drug enzymes and slowed a gut drug pump and the kidney's drug transporters. Scaled to a 60-kilogram (about 132-pound) adult, the high dose is the solubles of 17.1 grams of leaf a day.

Aug 16, 2026 →
Guide · Health & Science

Oolong Polyphenols

The compound family behind color and astringency. What catechins, theaflavins, and thearubigins actually are, structurally, and what partial oxidation does to each before the leaf ever reaches a cup.

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