Tagged: oxidation
Oolong Stays Floral Even Fermented Into Kombucha
A 2026 five-tea kombucha study found oolong's floral, fruity character came through the ferment strongest of the five, while black and pu-erh's own character mostly gave way to the culture's earthier profile. Oolong also tied green tea for the most antioxidant of the five.
Oolong Carried the Least of a Compound Class That Should Have Favored Green Tea
A 2026 study measured advanced glycation end-products, the same compounds tied to aging and inflammation, across five tea types. Oolong came out lowest of all five, and the antioxidant story that usually explains oolong's health claims does not explain why.
Why one plant makes green, oolong, and black tea
Green, oolong, and black tea are the same leaf from Camellia sinensis. What separates them is processing, above all how much enzymatic oxidation the maker allows before heat arrests it.
Why a Green Oolong and a Heavy Roast Never Want the Same Water
The brewing guide states the temperature bands by oxidation level. Here is the extraction chemistry, measured in real studies, that makes them true.
Two Reactions Start When the Leaf Is Bruised, Not One
Shaking bruises the leaf once, but it starts two separate reactions on two different substrates. One reddens the edge. The other, mapped only in the last few years, manufactures the floral scent.
Same Leaf, Split Into Green and Black, Kept Almost the Same Caffeine
Catechins collapsed by more than ninety percent between the two halves. Caffeine barely moved. Oxidation, the reaction that defines oolong, is not what decides how much of it ends up in the leaf.
Kill-Green
The heat step that arrests enzymatic oxidation in oolong. What denatures the enzymes and why it cannot be undone, the wok and the drum with their real numbers, how a maker judges it done, the two ways it fails, and the storage defect that only resembles one.
Oolong Oxidation and Roast
The two axes that define an oolong. What enzymatic oxidation is and how it is arrested by kill-green, why oolong sits partly oxidized between green and black, and how roasting is a separate step applied afterward.
Oolong Polyphenols
The compound family behind color, astringency, and every published health claim. What catechins, theaflavins, and thearubigins actually are, structurally, and what partial oxidation does to each before the leaf ever reaches a cup.
Storage and Aging
Most oolong is made to drink young and does not improve in a drawer. A roasted minority is made, and stored, to be re-roasted every few years and drunk decades later. The Standard on how that works, what changes in the leaf, and how it differs from aging pu-erh.
What Is Oolong Tea
Oolong is partly oxidized Camellia sinensis, made to a chosen point between green and black. This is the canonical account of what it is, how it is made, the major style families, how it tastes across the spectrum, and why it is brewed gongfu.