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

Tagged: clinical trial

Article · Health & Science

Oolong Raised a Gut Bacterium in Mice, Lowered It in People

One lab found oolong tea raises Megamonas in obese mice and lowers it in healthy humans. A separate cohort links the same bacterium to obesity through a named mechanism. Four studies, one genus, no agreement on what it does.

Aug 1, 2026 →
Article · Health & Science

The 1987 Team That Invented GABA Tea Tested It on Blood Pressure

The tea sold today for stress relief and better sleep was tested in 1987, by the team that made it, on hypertensive rats. The blood-pressure claim for GABA-rich foods has real, if modest, human trial evidence behind it. The calm claim now on the label rests on thinner proof, and on a molecule no human study has shown reaches the brain at all.

Jul 10, 2026 →
Article · Health & Science

The controlled oolong trials measured hours of fat-burning, not pounds

No systematic review of oolong and weight loss exists; the closest, green tea's, found its weight loss unlikely to be clinically relevant.

Jun 17, 2026 →
Article · Health & Science

The 2003 Oolong Diabetes Trial Was Led From a Tea Maker

A 2003 trial found oolong tea cut blood sugar by nearly 30 percent in diabetic patients. Its lead author worked at a beverage maker's research center, a trial in healthy men found nothing, and a cohort of 4,975 Japanese workers found heavier drinkers developed diabetes at a higher rate.

Apr 10, 2026 →
Guide · Health & Science

Oolong and the Clinical Trial

The evidence behind oolong's health claims runs from a 76,979-person cohort to a 20-person industry-run trial, and the two are not the same kind of proof. The method for reading a trial before trusting it: sample size, funding, statistical versus practical significance, and how much a single study should ever be allowed to settle a question.

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Guide · Health & Science

Oolong and Health

What the published research on oolong tea actually measures. The trial and cohort evidence on the heart, blood sugar, weight, and bone, and how partial oxidation changes the chemistry those trials test.

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