# Roman Chamomile (Chamaemelum nobile)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/roman-chamomile
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Chamaemelum nobile, English chamomile, Garden chamomile, Ground apple, Low chamomile, Whig plant, True chamomile, Noble chamomile, Sweet chamomile, Perennial chamomile

## Overview

Roman chamomile (Chamaemelum nobile) contains the flavonoid apigenin as its primary bioactive compound, which binds to GABA-A receptors to produce anxiolytic and sedative effects. Its essential oil, rich in isobutyl angelate and chamazulene, also inhibits COX-2 and [pro-inflammatory cytokine](/ingredients/condition/inflammation)s, contributing to its anti-inflammatory and antispasmodic actions.

## Health Benefits

• Reduces mucositis severity and pain with [anti-inflammatory](/ingredients/condition/inflammation) effects (Systematic review/meta-analysis).[1]
• Modest anxiolytic activity in generalized anxiety disorder (RCT, n=57, HAM-A score reduction).[3]
• May aid smooth [muscle relaxation](/ingredients/condition/sleep) (Preclinical studies).[4][6]
• Potential antioxidant effects by improving enzymes like GSH, GPx, and SOD (Preclinical rat studies).[2]
• Reduces [lipid peroxidation](/ingredients/condition/antioxidant) and IL-4 in bronchial inflammation models (Preclinical studies).[2]

## Mechanism of Action

Apigenin, the principal flavonoid in Roman chamomile, binds to benzodiazepine receptors on the GABA-A receptor complex, potentiating chloride ion influx and producing anxiolytic and mild sedative effects. Chamazulene and alpha-bisabolol in the essential oil inhibit COX-2 enzyme activity and suppress NF-κB signaling, reducing prostaglandin E2 synthesis and [pro-inflammatory cytokine](/ingredients/condition/inflammation) release including IL-6 and TNF-alpha. These combined pathways account for its antispasmodic action on smooth muscle via calcium channel modulation and its topical anti-inflammatory efficacy.

## Clinical Summary

A systematic review and meta-analysis found that chamomile (including Roman chamomile preparations) significantly reduced mucositis severity and associated oral pain in patients undergoing cancer treatment, with [anti-inflammatory](/ingredients/condition/inflammation) mechanisms as the proposed driver. A randomized controlled trial (n=57) demonstrated modest but statistically significant reductions in HAM-A anxiety scores following standardized chamomile extract supplementation compared to placebo in patients with generalized anxiety disorder. Preclinical studies consistently support smooth [muscle relaxation](/ingredients/condition/sleep) effects, though large-scale human RCTs for this indication remain lacking. Overall, evidence is strongest for oral mucositis and anxiety reduction, while [antioxidant](/ingredients/condition/antioxidant) and antispasmodic claims require further clinical validation.

## Nutritional Profile

Roman Chamomile (Chamaemelum nobile) is consumed primarily as a herbal infusion or extract rather than a macronutrient source, so conventional macronutrient profiling has limited relevance. Nonetheless, known compositional data includes: Bioactive Flavonoids: apigenin (primary active compound, ~0.5–1.0% dry weight of flower heads), luteolin, quercetin, and patuletin — apigenin bioavailability is moderate (~30%) but enhanced by gut microbial conversion from glycoside to aglycone form. Terpenoids/Sesquiterpenes: alpha-bisabolol (~10–25% of essential oil fraction), bisabolol oxides A and B, and chamazulene (trace to ~5% of essential oil) — responsible in part for [anti-inflammatory](/ingredients/condition/inflammation) and smooth muscle relaxant activity. Essential Oil Content: approximately 0.4–1.5% v/w in dried flower heads, comprising predominantly angelic and tiglic acid esters of butyl, amyl, and isoamyl alcohols (up to 75–80% of oil). Polyphenolic Acids: caffeic acid and ferulic acid derivatives present in small quantities (~0.1–0.3% dry weight). Coumarins: herniarin and umbelliferone detected at low concentrations (~0.1% dry weight), contributing to antispasmodic effects. Tannins: present at approximately 2–4% dry weight, contributing mild astringency. Mucilages/Polysaccharides: estimated 5–10% dry weight, contributing to potential mucosal-protective properties relevant to the observed mucositis benefit. Minerals (dried herb): potassium (~1,200 mg/100g), calcium (~400 mg/100g), magnesium (~60 mg/100g), iron (~10 mg/100g) — bioavailability from herbal infusion is low (~5–15% extraction efficiency). Vitamins: minor amounts of vitamin C (~5–10 mg/100g dried) and trace B vitamins; nutritionally insignificant at typical serving doses. A standard chamomile infusion (1–2g dried flowers in 150mL water) extracts approximately 0.5–1.2mg apigenin and limited mineral content, making micronutrient contribution negligible in dietary terms.

## Dosage & Preparation

Clinically studied dosages include 220 mg oral capsules standardized to 1.2% apigenin taken twice daily for anxiety. Topical or oral forms are used for [anti-inflammatory](/ingredients/condition/inflammation) effects, but specific dosages for Roman chamomile were not detailed. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Roman chamomile is generally well tolerated at typical dietary and supplemental doses, but individuals with allergies to Asteraceae/Compositae family plants (ragweed, chrysanthemums, marigolds) carry a meaningful risk of cross-reactive allergic reactions including contact dermatitis and, rarely, anaphylaxis. It may potentiate the effects of benzodiazepines, CNS depressants, and sedative medications due to its GABA-A agonist activity, and warfarin anticoagulant effects may be enhanced due to coumarin constituents in the plant. Roman chamomile is contraindicated in pregnancy, as uterine stimulant effects have been observed in preclinical models, and it should be used with caution in breastfeeding women. Children under two and individuals on anticoagulant therapy should consult a healthcare provider before use.

## Scientific Research

A 2024 systematic review and meta-analysis of 11 RCTs showed significant reductions in mucositis severity, with no heterogeneity (I²=0%, p=0.58).[1] An RCT with 57 patients indicated that chamomile extract significantly reduced anxiety scores.[3] Clinical trials often mix chamomile species, limiting specific evidence for Roman chamomile alone.

## Historical & Cultural Context

Roman chamomile has been traditionally used worldwide as a mild tranquilizer and [anti-inflammatory](/ingredients/condition/inflammation) agent. Its use in herbal practices for gastrointestinal issues parallels that of German chamomile.

## Synergistic Combinations

Lavender, valerian, passionflower, lemon balm, ashwagandha

## Frequently Asked Questions

### What is Roman chamomile used for?

Roman chamomile is primarily used to reduce anxiety, support sleep, relieve gastrointestinal spasms, and reduce inflammation. Clinical evidence supports its anxiolytic effects via apigenin's binding to GABA-A receptors, and a systematic review found it effective in reducing oral mucositis pain in cancer patients undergoing chemotherapy or radiation.

### What is the difference between Roman chamomile and German chamomile?

Roman chamomile (Chamaemelum nobile) and German chamomile (Matricaria chamomilla) are distinct species with overlapping but not identical chemical profiles. German chamomile contains significantly higher concentrations of chamazulene and alpha-bisabolol, making it more potent for topical anti-inflammatory use, while Roman chamomile has a higher ester content (notably isobutyl angelate) and is more commonly used in aromatherapy and for digestive antispasmodic effects.

### How much Roman chamomile should I take for anxiety?

The RCT demonstrating anxiolytic effects in generalized anxiety disorder used standardized chamomile extract at doses ranging from 220 mg to 1,100 mg per day of a standardized extract (1.2% apigenin), titrated based on response. No universal clinical dosing guideline exists yet, so individuals should follow product label instructions and consult a healthcare provider, particularly if combining with benzodiazepines or other CNS depressants.

### Is Roman chamomile safe during pregnancy?

Roman chamomile is considered unsafe during pregnancy and should be avoided. Preclinical studies have demonstrated uterine stimulant activity, raising concerns about an increased risk of miscarriage or preterm labor, and its coumarin constituents may also affect bleeding risk. Pregnant women should avoid Roman chamomile supplements and consult their obstetrician before using chamomile-containing herbal teas or essential oils.

### Does Roman chamomile interact with any medications?

Yes, Roman chamomile has several clinically relevant drug interactions. Its apigenin content potentiates GABA-A receptor activity, which can enhance the sedative and anxiolytic effects of benzodiazepines, barbiturates, and other CNS depressants. Additionally, coumarin derivatives present in the plant may inhibit platelet aggregation and enhance the anticoagulant effect of warfarin, increasing bleeding risk, so INR monitoring is advised for patients on blood thinners.

### What forms of Roman chamomile are most effective — tea, extract, or essential oil?

Clinical studies showing anxiolytic benefits have primarily used standardized extracts and tea preparations, which deliver consistent levels of active compounds like apigenin. Essential oil is traditionally used for aromatherapy but lacks robust clinical evidence for internal use and carries higher concentration risks. Tea and standardized extracts are generally preferred for internal supplementation due to established safety profiles and research support.

### Does Roman chamomile help with digestive issues and stomach inflammation?

Roman chamomile's anti-inflammatory and smooth muscle relaxation properties suggest potential benefits for digestive comfort, though most clinical evidence focuses on oral mucositis rather than gastrointestinal conditions specifically. Traditional use supports its role in supporting digestive function, but robust clinical trials directly measuring GI outcomes remain limited. It may be most effective as part of a broader digestive support strategy rather than as a standalone treatment.

### How does Roman chamomile compare to other calming herbs like passionflower or valerian for anxiety?

Roman chamomile shows modest anxiolytic activity in clinical trials (HAM-A score reductions in GAD), though passionflower and valerian have comparable or sometimes stronger evidence bases in anxiety studies. Roman chamomile is gentler and better tolerated by sensitive individuals, while valerian has a stronger historical research foundation despite causing drowsiness in some users. Choice between them depends on individual tolerance, desired onset time, and whether mild versus pronounced calming effects are preferred.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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