Does Rooibos Tea Have Caffeine? The Complete Guide
A 240 ml cup of rooibos (red bush) tea contains 0 mg of caffeine.
- Rooibos (240 ml) = 0 mg caffeine (classified with herbal, caffeine-free infusions).
- Common caffeinated alternatives: drip coffee (240 ml) = 96 mg145 mg47 mg.
- Population average caffeine half-life ≈ 5.7 hours; 145 mg → ~72.5 mg after 5.7 h, ~33 mg after 12 h.
- FDA safe limit for healthy adults is up to 400 mg/day; pregnancy guidance is about 200 mg/day
What is rooibos tea?
Rooibos (Aspalathus linearis), commonly called red bush or rooibos tea, is an herbal infusion made from a South African shrub. It is not derived from Camellia sinensis (the tea plant) and therefore contains no naturally occurring caffeine—classified with other herbal, caffeine-free teas in food databases such as USDA FoodData Central.
Caffeine content in rooibos tea
Measured per the standard 240 ml serving used in beverage datasets, rooibos registers 0 mg of caffeine. That same dataset lists "Herbal tea (caffeine-free)" at 0 mg for 240 ml. By contrast, decaffeinated coffee often still contains trace amounts (decaf coffee 240 ml = 3 mg).
Important caveat: some commercial products labeled "rooibos blends" mix rooibos with black or green tea. Those blends will inherit the caffeine of the added tea—always read the ingredient list.
How rooibos compares to common caffeinated drinks
Below is a practical comparison using authoritative beverage values so you can see where rooibos fits on the caffeine scale.
| Drink (serving) | Serving size | Caffeine (mg) |
|---|---|---|
| Rooibos / Herbal tea (caffeine-free) | 240 ml | 0 mg |
| Decaf coffee | 240 ml | 3 mg |
| Green tea | 240 ml | 28 mg |
| Black tea | 240 ml | 47 mg |
| Matcha (1 tsp) | 240 ml | 70 mg |
| Yerba mate | 240 ml | 85 mg |
| Drip coffee | 240 ml | 96 mg |
| Pour over | 240 ml | 145 mg |
| Cold brew | 240 ml | 200 mg |
Caffeine metabolism and timing — why rooibos helps sleep
Caffeine is eliminated exponentially; the population-average half-life is about 5.7 hours (sources: FDA summaries, pharmacokinetic literature). That means a single caffeinated beverage can leave non-trivial caffeine in your system many hours later. If you want zero stimulant exposure in the evening, rooibos provides that certainty.
Example: if you drank a 240 ml pour-over with 145 mg caffeine, this table shows approximate remaining caffeine at common time points (population-average decay).
| Time after dose | % remaining (approx) | Mg remaining from 145 mg |
|---|---|---|
| 0 hours | 100% | 145 mg |
| 3 hours | ≈69% | ~100 mg |
| 5.7 hours | ≈50% | ~72.5 mg |
| 6 hours | ≈48% | ~70 mg |
| 9 hours | ≈33% | ~48 mg |
| 12 hours | ≈23% | ~33 mg |
Because rooibos starts at 0 mg, there is no residual stimulant effect to track—useful if you are sensitive to sleep disruption or timing caffeine around exercise.
Health context and safety limits
Major health authorities provide intake guidance: the U.S. FDA indicates up to 400 mg/day is generally safe for healthy adults; many organizations and studies recommend limiting intake to about 200 mg/day during pregnancy (consult your clinician). The American Academy of Pediatrics discourages routine caffeine use in children and adolescents. Rooibos offers a caffeine-free alternative for people needing to keep totals near those limits.
Rooibos contains antioxidants and has a different tannin profile than black or green tea; research on its clinical benefits is ongoing. If you take medications or have liver disease, check with a healthcare professional before swapping large volumes of any herbal infusion into your routine.
Brewing, blends, and practical tips
To get the best flavor from rooibos: use boiling water (100°C), steep 5–7 minutes for a full, slightly sweet cup, or cold-brew overnight for a smoother iced rooibos. Because rooibos is naturally caffeine-free, you can steep longer than black tea without increasing stimulant content.
Watch labels: flavored or "chai" rooibos blends may include black or green tea leaves; those blends will have measurable caffeine. If you want to log intake precisely, tools like CoffeeLog can track caffeine across beverages and warn you when daily totals approach your personal limit.
When to choose rooibos
Choose rooibos if you need a soothing hot or iced beverage without caffeine—sleep-sensitive people, pregnant individuals trying to limit intake, children (per AAP guidance), or anyone avoiding stimulants. If you need a small stimulant lift but dislike coffee, consider low-caffeine options (green tea 28 mg/240 ml or matcha 70 mg) rather than full-strength coffee.
Rooibos is a reliable, zero-caffeine option but do confirm ingredients if you buy blends. Track mixed-drink days with an app or logbook to avoid accidental buildup from mixed sources (coffee, cola, energy drinks, and tea all add up).
Summary
Rooibos is naturally caffeine-free: a standard 240 ml cup contains 0 mg of caffeine. That makes it a simple, low-risk swap for a late-day hot drink or for anyone restricting stimulant intake. For precise daily accounting alongside coffee and energy drinks, consider a dedicated tracker such as CoffeeLog and consult authoritative sources like USDA FoodData Central and FDA guidance when planning limits.
Frequently asked questions
Does rooibos tea contain caffeine?
No — pure rooibos is naturally caffeine-free. A 240 ml cup of rooibos contains 0 mg of caffeine according to standard beverage values.
Can rooibos blends have caffeine?
Yes. If rooibos is blended with black or green tea, the blend will contain caffeine. Always read the ingredient list; pure rooibos alone has 0 mg per 240 ml.
Is rooibos safe during pregnancy?
Rooibos is caffeine-free and generally considered safe, but pregnancy guidance usually limits caffeine to ~200 mg/day. Check with your clinician before making major dietary changes.
Will rooibos help me sleep?
Yes—because it contains 0 mg of caffeine, rooibos won't contribute to nighttime stimulant load. Avoid blends with added tea if you need a caffeine-free bedtime drink.
How does rooibos compare to decaf coffee?
Rooibos (240 ml) = 0 mg; decaf coffee (240 ml) typically contains small traces (about 3 mg). Rooibos guarantees no caffeine if it's pure.
How should I brew rooibos for best flavor?
Use boiling water and steep 5–7 minutes for a full-bodied cup, or cold-brew overnight for iced rooibos. Longer steeps won’t add caffeine, only stronger flavor.