Chamomile tea is completely caffeine free. It contains zero milligrams of caffeine per cup, no matter how long you steep it or how strong you brew it. This is because chamomile is an herb, not a true tea. It comes from the flowers of the chamomile plant, which is botanically unrelated to the tea plant that produces caffeinated black, green, oolong, and white teas.
Why Chamomile Has No Caffeine
Caffeine occurs naturally in the leaves of a specific plant called Camellia sinensis. Every tea made from that plant, whether black, green, white, or oolong, contains caffeine in amounts ranging from 20 to 90 mg per 8-ounce cup. Chamomile doesn’t come from this plant at all. It belongs to the daisy family (Asteraceae), and its active compounds are entirely different: flavonoids like apigenin, terpenoids, and coumarins. None of these are stimulants.
This distinction matters because “decaffeinated” tea and “caffeine-free” tea are not the same thing. Decaf black or green tea still comes from Camellia sinensis and retains a small amount of residual caffeine, typically 2 to 5 mg per cup. Chamomile starts at zero and stays there. If you’re avoiding caffeine entirely, whether for pregnancy, medication interactions, or sleep, chamomile is a genuinely caffeine-free choice in a way that decaf tea is not.
Two Types of Chamomile, Both Caffeine Free
The two most common varieties are German chamomile (Matricaria recutita) and Roman chamomile (Chamaemelum nobile). Their chemical profiles differ slightly. German chamomile is richer in certain terpenoids and is the type most often used in tea bags and supplements. Roman chamomile shares many of the same flavonoids and is sometimes used in essential oils. Neither variety contains caffeine or any other stimulating compound. Their active ingredients promote relaxation rather than alertness.
How Chamomile Promotes Relaxation Instead
Rather than blocking sleepiness the way caffeine does, chamomile does the opposite. Its key compound, apigenin, interacts with receptors in the brain that calm nervous system activity. In animal studies, apigenin increased sedation and reduced physical restlessness, factors that help you fall asleep faster. It also appears to lower markers of inflammation in the brain while supporting proteins that protect nerve cells.
Clinical trials in humans back this up. Multiple studies have found that chamomile significantly reduces symptoms of generalized anxiety compared to placebo. One trial showed a moderate effect on trait anxiety, the kind of persistent, baseline anxiety that follows you through your day rather than spiking in response to a specific event. Other trials found meaningful improvements in psychological well-being alongside anxiety reduction. These effects are mild compared to prescription medications, but they’re consistent enough across studies to be taken seriously.
This is part of why chamomile is so popular as an evening drink. You’re not just avoiding a stimulant. You’re actively consuming something with calming properties.
Who Should Be Cautious
Chamomile is safe for most people, but two groups should pay attention.
If you’re allergic to ragweed, mugwort, or other plants in the daisy family, chamomile can trigger cross-reactive allergic responses. The proteins in chamomile flowers are similar enough to ragweed and mugwort pollen that your immune system may treat them as the same threat. Reactions range from mild (itchy mouth, hives) to severe. At least one published case documents a full anaphylactic reaction after drinking chamomile tea in a patient previously sensitized to mugwort pollen.
If you take blood thinners like warfarin, chamomile deserves a conversation with your pharmacist. Chamomile contains natural coumarin compounds that may amplify the blood-thinning effect. A case report in the Canadian Medical Association Journal described a patient whose blood-clotting levels rose to dangerous territory after drinking chamomile tea while on warfarin. The interaction is rare, but the consequences of excessive anticoagulation are serious enough to warrant caution.
Best Caffeine-Free Alternatives Alongside Chamomile
- Rooibos: Made from a South African shrub, naturally caffeine free with a slightly sweet, earthy flavor.
- Peppermint: Another herb with zero caffeine, often used for digestive comfort.
- Ginger tea: Caffeine free when brewed from fresh or dried ginger root alone.
- Hibiscus: Tart and naturally caffeine free, served hot or iced.
Any herbal tea, sometimes labeled “tisane,” is by definition not made from Camellia sinensis and will be naturally free of caffeine. The only time an herbal blend picks up caffeine is when it’s mixed with actual tea leaves or added caffeine, so check the ingredients list if you’re buying a flavored blend.