Overview
About Black tea
Black tea looks gentle but carries three separate triggers: it is high in caffeine, high in salicylates and very high in oxalate.
The oxalate is the one people miss, and it matters because black tea is one of the biggest dietary sources of oxalate linked to kidney stones. Cup for cup black tea has less caffeine than coffee, but the salicylate and oxalate load is where it can catch out sensitive people.
Sensitivities
How Black tea scores
Watch for
What trips people up
- Very high in oxalate, one of the leading dietary sources tied to calcium-oxalate kidney stones, so heavy drinkers are often told to cut back
- High in caffeine, though roughly half that of the same volume of brewed coffee, enough to affect sleep or jitters
- High in salicylates, a possible trigger if you react to aspirin or salicylate-rich foods
- Moderate in nickel, a minor consideration on a low-nickel diet
Diet fit
Where it fits
Swap ideas
More alternatives
FAQ
Common questions about Black tea
Is black tea bad for kidney stones?
Black tea is very high in oxalate and is one of the largest dietary contributors to calcium-oxalate stones, so people who form them are usually advised to limit it or dilute it with milk, which binds some of the oxalate. It is the oxalate, not the caffeine, that drives the stone risk.
Does black tea have less caffeine than coffee?
Yes. A cup of black tea has roughly half the caffeine of the same size cup of brewed coffee, so it is a lower-caffeine option, but it is still enough to disturb sleep or cause jitters in caffeine-sensitive people.
Why does tea contain salicylates?
Salicylates are natural plant compounds, and the tea plant is rich in them, so black tea tests high in salicylates. If you react to aspirin or to salicylate-heavy foods, strong tea can be a hidden contributor.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.