Chamomile tea is one of the most well-supported herbal teas for health, with measurable benefits for sleep, anxiety, digestion, and blood sugar. It’s caffeine-free, nearly calorie-free, and safe for most people at typical intake levels of one to three cups a day. The active compound behind most of these effects is apigenin, a plant flavonoid that interacts with receptors in the brain and has anti-inflammatory and antioxidant properties throughout the body.
Sleep Quality Improvements
A 2024 meta-analysis pooling ten clinical trials with 772 participants found that chamomile significantly improved overall sleep quality scores. The most consistent benefit was fewer nighttime awakenings: people who drank chamomile stayed asleep longer and woke up less often. Three out of four studies also showed faster sleep onset, meaning people fell asleep more quickly.
What chamomile didn’t do was increase total sleep duration or improve how rested people felt the next day. So think of it less as a knockout sleep aid and more as something that smooths out fragmented sleep. If your problem is waking at 3 a.m. and staring at the ceiling, chamomile has the strongest evidence in your favor. No adverse events were reported across any of the trials.
The sedative effect comes from apigenin, which influences activity at GABA receptors in the brain. GABA is the nervous system’s main “slow down” signal, and apigenin appears to modulate how it works, though the exact mechanism is more complex than simply mimicking a sedative drug. In animal studies, the calming effect scales with dose.
Anxiety Reduction
Chamomile has been tested against placebo in people diagnosed with generalized anxiety disorder. In a randomized clinical trial, participants taking chamomile extract saw a significantly greater drop in anxiety scores compared to placebo, with researchers defining a meaningful response as at least a 50% reduction from baseline anxiety levels. That’s a high bar, and chamomile cleared it for a meaningful portion of participants.
These trials used concentrated chamomile extract rather than brewed tea, so the doses were higher than what you’d get from a single cup. Still, the direction of the effect is consistent: chamomile reliably shifts anxiety levels downward. For everyday stress, a cup or two likely offers a milder version of the same benefit.
Digestive Benefits
Chamomile has a long history as a stomach remedy, and the science backs up the basics. It relaxes the smooth muscles that line the digestive tract, which helps relieve gas, bloating, and cramping. This antispasmodic effect is particularly useful for stress-related stomach discomfort, where tension in the gut wall causes pain or irregular movement of food through the intestines.
If you’re dealing with an unsettled stomach after a meal or mild cramping, a warm cup of chamomile works on two levels: the warmth itself relaxes the gut, and the active compounds reduce the muscle spasms driving the discomfort.
Blood Sugar and Inflammation
A systematic review and meta-analysis of randomized controlled trials found that chamomile consumption significantly reduced both fasting blood sugar and HbA1c, the marker that reflects average blood sugar over two to three months. The fasting blood sugar results were especially consistent across studies, with very low variation between trials. This doesn’t mean chamomile replaces any diabetes management plan, but it suggests that regular consumption may offer a modest, real benefit for glycemic control.
On the inflammation side, chamomile reduced levels of C-reactive protein (CRP), a key marker your body produces during inflammation. In a clinical trial comparing herbal tea drinkers to a control group, post-treatment CRP levels were significantly lower in the chamomile group. Chronic low-grade inflammation is linked to heart disease, metabolic disorders, and depression, so even a small reduction in baseline inflammation adds up over time.
Getting the Most From Your Cup
Research on tea steeping shows that extraction happens faster than most people expect. For tea bags, about two to three minutes of steeping pulls out more than half of the water-soluble polyphenols (the compounds responsible for antioxidant and anti-inflammatory effects). Steeping longer than five minutes offers diminishing returns for bagged tea. Loose-leaf chamomile is slower to release its compounds because of the larger particle size, so aim for ten to fifteen minutes if you’re brewing loose flowers.
Water temperature around 200°F (just below boiling) works well. Covering your cup while it steeps traps the volatile oils that carry both flavor and some of chamomile’s active compounds, since these evaporate easily in the steam.
Who Should Be Cautious
Chamomile belongs to the same plant family as ragweed, mugwort, and chrysanthemums. If you’re allergic to any of these, there’s a documented risk of cross-reactivity. An ELISA inhibition study confirmed that antibodies targeting ragweed and mugwort pollen also recognize proteins in chamomile tea. Reactions can range from mild itching to, in rare cases, anaphylaxis. One published case involved a patient previously sensitized to mugwort pollen who experienced a severe allergic reaction from chamomile tea alone.
People taking blood thinners, particularly warfarin, should also exercise caution. Chamomile contains coumarin-like compounds that may amplify the anticoagulant effect. A documented case report described a 70-year-old woman on warfarin who was hospitalized with multiple internal hemorrhages after regularly consuming chamomile tea and using chamomile lotion. If you’re on blood thinners, it’s worth flagging your chamomile habit with your prescriber.
For pregnancy, the evidence is thin in both directions. A 2025 review concluded that there isn’t enough data to issue formal clinical recommendations either for or against chamomile use during pregnancy. The studies that do exist are small and inconsistent in the type and dose of chamomile used.
How Much to Drink
Most clinical trials used one to three cups per day, or equivalent extract doses. That range is enough to produce measurable effects on sleep and anxiety without any reported side effects across hundreds of study participants. There’s no established upper limit, but the benefits appear to plateau rather than scale indefinitely with higher intake. One to two cups in the evening is a reasonable starting point if you’re drinking it for sleep, while spreading intake throughout the day makes more sense for digestive or anti-inflammatory purposes.