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: blood sugar

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 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.

→