What Teas Are Low in Caffeine? A Complete Guide
See which teas are naturally low in caffeine or caffeine-free, how decaf tea really works, and which teas actually have the most caffeine.
Updated · 3 min read
If you're sensitive to caffeine, herbal teas like rooibos, chamomile and peppermint are naturally caffeine-free, while true teas (green, black, white and oolong) all contain caffeine in similar ranges. Here's how to tell them apart and what actually affects caffeine content.
What Is Caffeine, Exactly?
Caffeine is a naturally occurring stimulant found in coffee, true tea (Camellia sinensis), mate and guarana, among other plants. In tea it was originally called "theine," until researchers confirmed it's the same molecule as the caffeine in coffee.
Caffeine works by blocking the receptors your brain uses to feel tired, which is why it keeps you alert. Taken in moderate amounts it's considered safe for most healthy adults, though regular heavy use can lead to dependence and withdrawal symptoms like headaches if you stop suddenly.
Which Teas Are Naturally Low in Caffeine or Caffeine-Free?
A common misconception is that decaffeinated tea has no caffeine at all. In reality, decaf tea still contains a small amount, typically 5–10 mg per cup. If you want a truly caffeine-free option, herbal ("tisane") infusions are the way to go, since they're not made from the Camellia sinensis plant.
Rooibos Tea
A South African plant that contains zero caffeine. It's naturally sweet, pairs well with milk or honey, and is considered safe during pregnancy and breastfeeding.
Chai-Style Spice Blends (Caffeine-Free Versions)
Traditional chai is made with black tea, so it does contain caffeine. But spice blends of cinnamon, ginger, cardamom and cloves brewed without black tea make a warming, caffeine-free alternative.
Chamomile Tea
Made from chamomile flowers, this tea has no caffeine and is commonly used for its calming, digestion-friendly reputation.
Ginger Tea
Naturally caffeine-free and often used to settle the stomach; also a popular base for other caffeine-free blends.
Peppermint Tea
Peppermint leaves contain no caffeine, which makes this a good option before bed if you enjoy a hot drink at night.
Ginseng Tea
Despite the name, ginseng isn't related to ginger. It's naturally caffeine-free and has a slightly earthy, bittersweet flavor that pairs well with lemon and honey.
Which Tea Has the Most Caffeine?
Caffeine content varies more between individual teas than between broad categories like black, green, white or oolong. A widely cited 2005 study in the Journal of Food Science measured caffeine across 77 different teas and found a wide range within both green and black categories — and, surprisingly, some white teas tested higher than expected, challenging the idea that white tea is always low in caffeine.
Matcha stands out as one of the highest-caffeine teas, mainly because it's a powdered tea: when you drink matcha, you're consuming the entire leaf rather than just what steeps out of it, so you get closer to 100% of the leaf's caffeine content in the cup.
What Actually Changes Caffeine Content
The biggest factors are water temperature and steep time, not the type of tea itself:
| Factor | Effect on caffeine |
|---|---|
| Longer steep time | More caffeine extracted |
| Hotter water | More caffeine extracted |
| Younger leaves / leaf buds | Naturally higher caffeine |
| Oxidation level (green vs. black) | Little to no effect on caffeine |
A tea steeped for 5 minutes in boiling water will have noticeably more caffeine than the same tea steeped for 2 minutes at a lower temperature — regardless of whether it's green, black or oolong.
FAQ
Is herbal tea always caffeine-free?
Almost always, yes — as long as it doesn't contain added black, green or white tea leaves. Always check the ingredient list on blended teas.
Does steeping tea longer remove caffeine?
No — steeping longer actually increases caffeine content, since more of it dissolves into the water over time.
Which is better for cutting caffeine: decaf tea or herbal tea?
Herbal tea, since decaf tea still contains a small amount of caffeine. If you want zero caffeine, choose a true herbal infusion like rooibos or chamomile.
The Bottom Line
For genuinely caffeine-free options, stick to herbal infusions like rooibos, chamomile, ginger and peppermint. If you still want the flavor of true tea, shorter steep times and cooler water will lower — but not eliminate — the caffeine. For more on specific teas, see our guides to caffeine-free tea, chai tea caffeine content, how much caffeine is in green tea, and white tea caffeine content.