Drinking chamomile tea every day is safe for most adults, and one to two cups daily is the amount most commonly used in clinical research. Studies have tested up to five cups a day without significant adverse effects. Beyond safety, daily consumption appears to offer real, measurable benefits for sleep, blood sugar, digestion, and anxiety.
How It Affects Sleep
Chamomile contains a compound called apigenin that binds to the same receptors in the brain targeted by anti-anxiety medications. This interaction calms neural activity, which is why a cup before bed can make it easier to drift off. A 2024 meta-analysis of clinical trials found that chamomile improved sleep onset (how quickly people fell asleep) in three out of four studies. It also reduced the number of times people woke up during the night.
That said, chamomile didn’t improve total sleep duration or sleep efficiency in those same trials, and it didn’t help with daytime drowsiness. So it’s better understood as something that helps you fall asleep and stay asleep, not something that changes the overall architecture of your sleep.
Blood Sugar Benefits
Daily chamomile consumption has a notable effect on blood sugar. A meta-analysis of human trials found that people drinking chamomile had significantly lower fasting blood glucose and lower HbA1c, a marker that reflects average blood sugar over two to three months. The dose-response analysis showed that for every additional 100 mg per day of chamomile, blood glucose declined further.
The mechanism involves several pathways. Chamomile appears to help insulin work more efficiently by increasing the liver’s capacity to store sugar, protecting the insulin-producing cells in the pancreas from oxidative damage, and activating receptors in fat cells that improve insulin sensitivity. One of its active compounds, luteolin, also helps cells absorb glucose more effectively. These effects were consistent across studies, though chamomile did not significantly reduce insulin resistance itself in the human trials analyzed so far.
Anxiety and Mood
In a randomized, double-blind trial of people with generalized anxiety disorder, those taking chamomile extract saw their anxiety scores drop by about 53%, compared to 35% in the placebo group. A separate well-being scale showed similar patterns, with the chamomile group reporting more improvement in overall psychological health. These results didn’t all reach statistical significance, but the trend was consistent across multiple measures.
The calming effect likely works through several brain chemical systems at once. Apigenin’s interaction with receptors normally targeted by sedative drugs is the best-studied pathway, but chamomile also appears to influence serotonin, dopamine, and noradrenaline signaling, along with the body’s stress hormone system. This multi-pathway action may explain why the effects feel gentle rather than sedating.
Digestive Relief
Chamomile has a long track record as a digestive aid, and the science backs it up. It relaxes the smooth muscles that line the intestines, which helps relieve gas, bloating, and cramping. This antispasmodic effect makes it particularly useful after meals or during bouts of indigestion. It has also been used traditionally for nausea, diarrhea, and motion sickness, though the clinical evidence for these specific uses is thinner than for its anti-spasm properties.
How to Get the Most From Your Cup
Steeping technique matters more than most people realize. The active compounds in chamomile, particularly its phenols and flavonoids, extract more completely at higher temperatures and longer steep times. Research on extraction kinetics found that chamomile released its maximum concentration of beneficial compounds when steeped at around 90°C (just below a full boil) for 20 minutes. Even extending your steep from 3 minutes to 10 minutes after pouring boiling water significantly increases the phenolic content of the tea. If you’re drinking chamomile for its health effects rather than just flavor, give it a longer steep than you might by default.
Who Should Be Cautious
If you take blood-thinning medication, chamomile deserves extra attention. Chamomile contains natural coumarin compounds that can amplify the effects of anticoagulants. A published case report documented a 70-year-old woman on warfarin who experienced multiple internal hemorrhages after using chamomile products heavily. The coumarin in chamomile likely worked in synergy with her medication, pushing her blood-thinning levels dangerously high. Occasional use may be fine for many people on these drugs, but daily, heavy consumption is a real risk.
Chamomile also weakly inhibits a liver enzyme called CYP1A2, which helps your body process certain medications. While this inhibition is mild, it could theoretically affect how quickly your body clears drugs metabolized through that pathway.
Pregnancy is another situation where daily chamomile tea raises concerns. There are no clinical trials confirming its safety during pregnancy, and the available evidence is not reassuring. Case reports have documented fetal heart duct constriction in women who drank chamomile regularly during pregnancy, with the condition improving after they stopped. A retrospective study also found that regular chamomile consumption in the third trimester was associated with higher rates of preterm delivery and lower birth weight. Based on this evidence, chamomile is generally considered unsafe for regular use during pregnancy. If you’re pregnant and want herbal tea, it’s worth choosing alternatives with better-established safety profiles.
People with allergies to plants in the daisy family (ragweed, chrysanthemums, marigolds) may also react to chamomile, since it belongs to the same botanical group.