Does decaf coffee really have no caffeine?
Not quite—trace amounts of 1–3% remain. A cup of decaf coffee contains about 2–5 mg of caffeine instead of 80–120 mg. Negligible for most people, but worth noting if you have extreme caffeine sensitivity.
Why that is
"Decaffeinated" sounds like zero caffeine—but it isn't. No decaffeination method removes 100% of the caffeine. The EU mandates that roasted coffee can be sold as "decaffeinated" if it contains a maximum of 0.1% caffeine (by dry weight). Depending on the original bean, only a small share of the original caffeine remains.
What that means in practice:
| Beverage | Caffeine |
|---|---|
| Filter coffee (200 ml) | 80–120 mg |
| Espresso (25 ml) | 50–70 mg |
| Decaf filter coffee (200 ml) | 2–5 mg |
| Decaf espresso (25 ml) | 1–3 mg |
For comparison:
- A cup of green tea contains 20–40 mg of caffeine.
- A bar of dark chocolate (100 g) contains 40–70 mg.
- Decaffeinated coffee has significantly less caffeine than tea or chocolate.
Who is this relevant for?
- Most people: 2–5 mg of caffeine is unnoticeable. Even 5 cups of decaf a day only equals 10–25 mg—less than half a cup of regular coffee.
- Extremely caffeine-sensitive people: With rare genetic variants (very slow CYP1A2 metabolizers), even small amounts can be felt.
- Medication interactions: For medications that conflict with caffeine, consult a doctor first—even if the amount is minimal.
Even with the Swiss Water Process, a small amount of caffeine remains in the cup.
In practice at Green Wall Coffee
At Sophienstraße 27, we're honest: decaffeinated doesn't mean caffeine-free. But 2–5 mg per cup is so little that we comfortably recommend our decaf in the evenings. Our decaf is decaffeinated with the CO₂ process.
If you want to taste the difference yourself: Sophienstraße 27, Berlin-Lichtenberg. Mon–Fri 8am–5pm, Sat 10am–5pm.
Further reading
Related questions:
- Does decaf coffee taste different than regular coffee?
- What decaffeination methods are there?
- How is coffee decaffeinated?
Also relevant:
- Does espresso or filter coffee have more caffeine? — Health & Caffeine
- How much caffeine is in a cup of coffee? — Health & Caffeine
All questions in this topic: Decaffeinated Coffee