Article · Health & Science
The 1987 Paper That Invented GABA Oolong Was About Blood Pressure
The tea sold today for stress relief and better sleep began as a 1987 Japanese food-science paper aimed at hypertension. That claim 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 →