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Tagged: caffeine

Article · Estates & Terroir

Acid, Aluminum, and Rain: The Soil and Monsoon Behind an Assam Cup

The valley's soil runs strongly acidic and aluminum-heavy, and the monsoon delivers nearly three-quarters of the year's rain in five months. The compound most articles credit for the malty taste has never actually been tested for it. Here is what the record can, and cannot, certify.

May 13, 2026
Article · Brewing

The Cloud in the Cup: Tea Cream as a Strength Test

A strong Assam left to cool turns cloudy, sometimes almost jelly thick. It is not spoiled tea. It is caffeine and the leaf's own strongest compounds falling out of solution, and the trade has used it as a strength test since long before anyone could explain it.

Mar 12, 2026
Article · Brewing

Assam's Caffeine, By Weight and Measure

An average cup of black tea carries about 48 milligrams of caffeine, roughly half of what a cup of coffee holds, and Assam runs toward the strong end of that range. Here is the actual lab measure of Assam's leaf, orthodox against CTC, what changes the dose in your cup, and the 90 to 95 percent decaffeinated version Assam's own research institute has just built.

Feb 19, 2026
Guide · Basics

The Assamica Plant

The complete reference on Camellia sinensis var. assamica, the large-leaf tea plant every cup certified by this office is made from. What it is, where it grows wild, the naming dispute that took taxonomists a century to settle, and how its chemistry builds the strong cup.

Guide · Brewing

The Standard on Briskness

Briskness is the word this office certifies every cup on, and it names something exact, not a vibe: a live, bright character in the liquor that the trade can put a number on. What the word means, the formula behind it, and what raises or dulls it, cup by cup.

Guide · Basics

Assam Tea and Health

The Authority's standing record on Assam tea and health, sorted by how strong the evidence is: what the chemistry of the cup actually measures out to, what the human trials and cohorts support, what the FDA and EFSA have and have not allowed on a label, what milk does, where the ceilings sit, and what the health record looks like in the gardens themselves.