Outcomes

What chamomile actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect size Evidence Dose Weeks Rank

Reduce bloating and trapped gas Large effect, needs confirmation

Less belly swelling, pressure, and gassiness after meals.

1 RCT n=64 — — #5/12

37336118

large

1 RCT n=64

—

#5 /12

Lower day-to-day anxiety Promising early signal

The background hum of worry that colors everything gets quieter.

5 RCTs n=241 220–1500 mg 4–26 wk

21939549·19593179·22894890·27716513 +1 more

moderate

5 RCTs n=241

220–1500 mg

4–26 wk

—

Ease anxiety in older adults Not enough research

Quiets the health worries and body tension that build with age.

4 RCTs n=207 220–1500 mg 8–26 wk

19593179·22894890·27716513·27912875

trivial

4 RCTs n=207

220–1500 mg

8–26 wk

—

Reduce pre-competition anxiety Not enough research

Quiets the overthinking that hijacks execution right before you compete.

4 RCTs n=207 220–1500 mg 8–26 wk

19593179·22894890·27716513·27912875

trivial

4 RCTs n=207

220–1500 mg

8–26 wk

—

Fall asleep faster Barely detectable

Shrinks the gap between hitting the pillow and actually sleeping.

2 RCTs n=91 220–1100 mg 4–8 wk

21939549·22894890

trivial

2 RCTs n=91

220–1100 mg

4–8 wk

—

Stay asleep through the night Barely detectable

Fewer wake-ups and more unbroken hours of real rest.

2 RCTs n=91 220–1100 mg 4–8 wk #10/15

21939549·22894890

trivial

2 RCTs n=91

220–1100 mg

4–8 wk

#10 /15

Improve overall sleep quality Not enough research

Deeper, less interrupted nights that leave you recharged by morning.

2 RCTs n=34 540–800 mg 4 wk

21939549·28616420

trivial

2 RCTs n=34

540–800 mg

4 wk

—

Break the insomnia cycle Barely detectable

Quiets the nervous-system overdrive that keeps you wired at bedtime.

1 RCT n=34 540 mg 4 wk

21939549

trivial

1 RCT n=34

540 mg

4 wk

—

Improve overall digestive comfort Not enough research

Less cramping, rumbling, and unease throughout your gut.

1 RCT n=57 220–1100 mg 8 wk

22894890

trivial

1 RCT n=57

220–1100 mg

8 wk

—

Outcome	Effect	Evidence	Dose	Weeks	Rank
Reduce bloating and trapped gas Large effect, needs confirmation	large	1 RCT n=64	—	—	#5/12
Lower day-to-day anxiety Promising early signal	moderate	5 RCTs n=241	220–1500 mg	4–26 wk	—
Ease anxiety in older adults Not enough research	trivial	4 RCTs n=207	220–1500 mg	8–26 wk	—
Reduce pre-competition anxiety Not enough research	trivial	4 RCTs n=207	220–1500 mg	8–26 wk	—
Fall asleep faster Barely detectable	trivial	2 RCTs n=91	220–1100 mg	4–8 wk	—
Stay asleep through the night Barely detectable	trivial	2 RCTs n=91	220–1100 mg	4–8 wk	#10/15
Improve overall sleep quality Not enough research	trivial	2 RCTs n=34	540–800 mg	4 wk	—
Break the insomnia cycle Barely detectable	trivial	1 RCT n=34	540 mg	4 wk	—
Improve overall digestive comfort Not enough research	trivial	1 RCT n=57	220–1100 mg	8 wk	—

Buy well

Recommended Chamomile products

Real products that dose Chamomile where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Chamomile dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

Risk profile

Adverse events and known drug interactions

Safety events

retroperitoneal and rectus sheath hematomas; major internal hemorrhage severe

bleeding severe

Botulism (infant botulism risk from contamination) severe

Any adverse event mild

Infections mild

Headache mild

Dizziness mild

Gastrointestinal symptoms mild

Drug interactions

Warfarin major increases effect

Cyclosporine major increases concentration

Warfarin major increases effect

Antithrombotic Agents major increases toxicity

Antithrombotic Agents moderate increases toxicity

Ondansetron minor unknown

Co-studied with

Supplements that share evidence with chamomile

Theanine 13 shared outcomes · d=0.54

Sources

Generated August 14, 2026

Chamomile

What chamomile actually does, by outcome

Recommended Chamomile products

Adverse events and known drug interactions

Supplements that share evidence with chamomile

More evidence for Chamomile

Chamomile's Quiet Power: from ancient cradle tea to cautious clinical promise

Best Supplements for Anxiety, Ranked by Clinical Evidence

Best Supplements to Stay Asleep Through the Night

Stress: evidence map across 46 supplements

Sleep: evidence map across 37 supplements

5-HTP

Chamomile

Recommended Chamomile products

More evidence for Chamomile

NewChamomile's Quiet Power: from ancient cradle tea to cautious clinical promise

NewBest Supplements for Anxiety, Ranked by Clinical Evidence

NewBest Supplements to Stay Asleep Through the Night

NewStress: evidence map across 46 supplements

NewSleep: evidence map across 37 supplements

New5-HTP

Chamomile's Quiet Power: from ancient cradle tea to cautious clinical promise

Best Supplements for Anxiety, Ranked by Clinical Evidence

Best Supplements to Stay Asleep Through the Night

Stress: evidence map across 46 supplements

Sleep: evidence map across 37 supplements

5-HTP