Plant Comparison

Red Clover vs Sweet Violet

A side-by-side comparison of two medicinal plants — every documented constituent, action, use, safety note and cited source, assembled automatically from the Omnia Sana database.

First plant

Second plant

Plant ARed CloverTrifolium pratenseFabaceaeFull monograph →

Plant BSweet VioletViola odorataViolaceaeFull monograph →

At a glance

Red Clover and Sweet Violet: they share 7 indicated uses (arthritis / joint pain, bronchitis, cough, …); 3 pharmacological actions in common.

Red CloverSweet Violet

Constituents23

Pharmacological actions105

Indicated uses1611

Safety notes22

Cited sources4416

Indicated uses

Only Red Clover

Cardiovascular / heart healthMenstrual crampsMuscle spasmMenopauseHot flashesHigh cholesterolBlood sugar / diabetes supportCognitive functionWounds

Shared (7)

Arthritis / joint painBronchitisCoughInflammation (general)Respiratory supportSkin irritationCancer (anticancer research)

Only Sweet Violet

AsthmaHeadacheInsomnia / sleeplessnessSore throat

Pharmacological actions

Only Red Clover

AntioxidantAntispasmodicLipid-loweringNeuroprotective / cognition supportAntidiabetic (blood-sugar lowering)AntimicrobialVulnerary (wound healing)

Shared (3)

Anti-inflammatoryExpectorantAnticancer (preclinical)

Only Sweet Violet

Demulcent (soothing mucilage)Sedative / sleep support

Evidence face-off — shared uses

Condition	Red Clover	Sweet Violet	Verdict
Arthritis / joint pain	5/10	1/10	Stronger for Red Clover
Bronchitis	5/10	5/10	Comparable evidence
Cough	5/10	5/10	Comparable evidence
Inflammation (general)	5/10	1/10	Stronger for Red Clover
Respiratory support	5/10	6/10	Comparable evidence
Skin irritation	5/10	5/10	Comparable evidence
Cancer (anticancer research)	7/10	2/10	Stronger for Red Clover

Evidence scores (1–10) are computed from the tier of each cited source. “Comparable” means the two scores are within one point. Follow a score to its detailed sources.

Key Constituents

Isoflavones (formononetin, biochanin A, daidzein, genistein)^[14]

Phytoestrogenic isoflavones responsible for the plant's estrogenic and cardiovascular research interest; one of the richest known plant sources.

Flavonoids

Coumarins^[40]

Contribute mild anticoagulant activity; relevant to the plant's caution around blood-thinning medication.

Coumarins

Mucilage and saponins^[11]

Mucilage gives the soothing demulcent action; saponins give the expectorant action.

MucilageSaponins

Flavonoids and salicylic acid^{[2, 11]}

Antioxidant and mild analgesic constituents.

Flavonoids

Alkaloids (e.g. violine) and essential oil^[11]

Minor aromatic and bioactive constituents.

Essential (volatile) oilAlkaloids

Pharmacological Actions

Anti-inflammatory^{[4, 14, 17, 22, 28, 33, 34, 40, 41]}

Antioxidant^{[4, 6, 14, 16, 17, 22, 28, 29, 40, 41]}

Antispasmodic^{[8, 14, 40, 41]}

Antispasmodic (cramp easing)

Expectorant^{[14, 40, 41]}

Lipid-lowering^{[5, 11, 13]}

Anticancer (preclinical)^{[16, 18, 19, 20, 21, 35, 36, 37]}

Neuroprotective / cognition support^{[23, 30, 31, 32]}

Antidiabetic (blood-sugar lowering)^{[24, 25, 38]}

Antimicrobial^{[17, 27]}

Vulnerary (wound healing)^{[17, 39]}

Anti-inflammatory^{[1, 4, 11]}

Anticancer (preclinical)^{[3, 10]}

Demulcent (soothing mucilage)^{[1, 11, 12]}

Demulcent / expectorant for cough, bronchitis and catarrh (mucilage soothes; saponins loosen mucus) - a double-blind RCT found violet-flower syrup, added to standard treatment, sped cough suppression in children with asthma

Expectorant^{[1, 6, 11, 12]}

Sedative / sleep support^{[1, 7, 8, 9, 11]}

Mild sedative for sleeplessness and to ease headache (traditional)

Traditional & Indicated Uses

Arthritis / joint pain^{[14, 34, 40, 41]}Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5

Label: Arthritis / joint pain

Bronchitis^{[14, 40, 41]}Moderate · 5/10

inferred from expectorant action

Evidence: 5

Label: Bronchitis

Cardiovascular / heart health^{[2, 10, 13, 14, 16, 33, 40, 41]}Strong · 9/10

Evidence: 9

Label: Cardiovascular / heart health

Cough^{[14, 40, 41]}Moderate · 5/10

inferred from expectorant action

Evidence: 5

Label: Cough

Inflammation (general)^{[14, 28, 40, 41]}Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5

Label: Inflammation (general)

Menstrual cramps^{[8, 14, 40, 41]}Moderate · 5/10

Evidence: 5

Label: Menstrual cramps

Muscle spasm^{[8, 14, 40, 41]}Moderate · 5/10

inferred from antispasmodic action

Evidence: 5

Label: Muscle spasm

Respiratory support^{[14, 40, 41]}Moderate · 5/10

inferred from expectorant action

Evidence: 5

Label: Respiratory support

Skin irritation^{[7, 14, 40, 41]}Moderate · 5/10

inferred from anti-inflammatory action

Evidence: 5

Label: Skin irritation

Menopause^{[1, 5, 11, 12, 15]}Strong · 9/10

Evidence: 9

Label: Menopause

Hot flashes^{[1, 5, 11, 12]}Strong · 9/10

Evidence: 9

Label: Hot flashes

High cholesterol^{[5, 11, 13]}Strong · 9/10

Evidence: 9

Label: High cholesterol

Cancer (anticancer research)^{[16, 18, 19, 20, 21, 35, 36, 37]}Good · 7/10

inferred from anticancer action

Evidence: 7

Label: Cancer (anticancer research)

Blood sugar / diabetes support^{[24, 25, 38]}Traditional · 2/10

Evidence: 2

Label: Blood sugar / diabetes support

Cognitive function^{[23, 30, 31, 32]}Good · 8/10

inferred from neuroprotective action

Evidence: 8

Label: Cognitive function

Wounds^{[17, 39]}Good · 7/10

inferred from vulnerary action

Evidence: 7

Label: Wounds

Arthritis / joint pain^[11]Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1

Label: Arthritis / joint pain

Asthma^{[11, 12]}Moderate · 5/10

Evidence: 5

Label: Asthma

Bronchitis^{[11, 12]}Moderate · 5/10

Evidence: 5

Label: Bronchitis

Cancer (anticancer research)^{[3, 10]}Traditional · 2/10

inferred from anticancer action

Evidence: 2

Label: Cancer (anticancer research)

Cough^{[11, 12]}Moderate · 5/10

Evidence: 5

Label: Cough

Headache^[11]Traditional · 1/10

Mild sedative for sleeplessness and to ease headache (traditional)

Evidence: 1

Label: Headache

Inflammation (general)^[11]Traditional · 1/10

inferred from anti-inflammatory action

Evidence: 1

Label: Inflammation (general)

Insomnia / sleeplessness^{[8, 9, 11]}Moderate · 6/10

Mild sedative for sleeplessness and to ease headache (traditional)

Evidence: 6

Label: Insomnia / sleeplessness

Respiratory support^{[6, 11, 12]}Moderate · 6/10

inferred from expectorant action

Evidence: 6

Label: Respiratory support

Skin irritation^{[5, 11, 12]}Moderate · 5/10

inferred from demulcent action

Evidence: 5

Label: Skin irritation

Sore throat^[11]Traditional · 1/10

Evidence: 1

Label: Sore throat

Safety, Cautions & Contraindications

Safety note^{[14, 40, 41]}Caution

Generally safe in normal dietary amounts. Isoflavones are phytoestrogens — exercise caution in oestrogen-receptor-positive breast cancer patients or those taking hormone therapies. May interact with warfarin (antiplatelet activity). Avoid in pregnancy and breastfeeding. Well tolerated in most adults.

Safety note^{[14, 40, 41, 42]}Caution

Duke (2002) rates red clover as +++ and provides clinical evidence (score 2) for estrogenic activity — the plant is one of the richest plant sources of isoflavones (formononetin, biochanin A, daidzein, genistein). Clinical applications include menopausal symptom relief, osteoporosis prevention, and cardiovascular protection in peri-menopausal women. Dose: standardized extract providing 40–160 mg isoflavones daily. Duke cautions that due to strong estrogenic activity, red clover is not recommended in estrogen-dependent cancers (breast, uterine) or alongside hormone replacement therapy without medical supervision. Anti-coagulant coumarins are also present (Duke, 2002).

Safety note^{[11, 13]}Caution

Generally well tolerated as flower/leaf preparations. It contains salicylates, so use caution if you are salicylate-sensitive; the root in large doses is emetic and purgative.

Safety note^[13]Caution

Safety in pregnancy and breastfeeding is not established, so avoid medicinal doses.

External Ids

Gbif: 8324121

Wikidata: Q156635

Gbif: 5331181

Wikidata: Q108684

Botanical Description

Short-lived perennial herb with trifoliate leaves, each leaflet oval and often marked with a pale chevron, arising from a spreading, slightly hairy stem. Dense, rounded, pink to magenta flower heads are borne at the stem tips.^[40]

Height: 20-60 cm

Habit: Short-lived perennial herb, spreading via a branching taproot

Leaves: Trifoliate, each leaflet oval with a pale chevron marking, slightly hairy

Flowers: Dense, rounded heads of small pink to magenta pea-like flowers

Stem: Slightly hairy, branching, spreading

Root: Branching taproot with nitrogen-fixing root nodules

Fruit: Small pod containing 1-2 seeds, enclosed within the dried flower head

Flowering Period: May-September

Low, spreading perennial herb with heart-shaped, softly toothed leaves arising from a short rootstock, spreading by runners (stolons). Fragrant, deep violet-purple (occasionally white) flowers with five petals, the lower petal spurred, are borne singly on slender stalks.^[11]

Height: 5-15 cm

Habit: Low, spreading perennial herb, spreading by runners

Leaves: Heart-shaped, softly toothed

Flowers: Fragrant, deep violet-purple (occasionally white), five-petalled, the lower petal spurred, borne singly

Stem: Very short; leaves and flowers arise from a basal rootstock, spreading by stolons

Root: Short rootstock with spreading runners

Fruit: Small three-valved capsule

Flowering Period: February-April (with a lighter second flush in autumn)

Habitat

Grows in meadows, pastures, roadsides and grassy waste ground; native to Europe, western Asia and North Africa and widely naturalised and cultivated as a forage crop elsewhere.^[40]

Grows in woodland edges, hedgerows, shaded banks and gardens on moist, humus-rich soils; native to Europe, North Africa and Asia and widely naturalised and cultivated elsewhere.^[11]

Harvesting

The flowering heads are picked at full bloom in summer and dried quickly in a warm, shaded, airy place to preserve isoflavone content and colour.^[40]

Parts: Flower, Leaf

Season: Summer, at full bloom

Flowers are picked as they open in early spring; leaves can be gathered through the growing season and dried.^[11]

Parts: Flower and leaf (aerial parts)

Season: Flower in early spring; leaf through the growing season

Traditional Uses

Red clover flower has a long folk tradition as a blood-purifying and expectorant remedy for coughs and skin complaints, and more recently has become one of the most studied herbal sources of isoflavone phytoestrogens, researched for menopausal symptom relief and cardiovascular and bone support.^{[14, 40, 41]}

Sweet violet flower and leaf have a long European folk history as a soothing demulcent and expectorant remedy for cough, bronchitis and catarrh, and as a mild sedative for sleeplessness and headache; the flower syrup in particular has a long tradition as a children's cough remedy.^[11]

Preparations

Infusion (flower)^[40]

Dried flower heads infused in hot water as a traditional tea for coughs and as a general tonic.

Standardized isoflavone extract^[14]

Standardized isoflavone extract in tablet form, the form used in most menopause-related clinical research.

Syrup (flower)^[12]

Fresh flowers infused and combined with sugar syrup as a traditional soothing cough remedy, particularly for children.

Infusion^[11]

Dried flower or leaf infused in hot water as a traditional demulcent, calming tea.

Dosage

Standardized extract^[14]

Clinical research commonly uses around 40-80 mg isoflavones daily. Educational reference only, not a prescription.

Infusion/syrup^[8]

A double-blind randomised placebo-controlled trial used 5 mL of Viola odorata syrup every 12 hours for 4 weeks as add-on therapy for insomnia. Traditional references suggest around 2-4 g of dried flower and leaf per cup, up to three times daily. Note the EU monograph on Violae herba cum flore covers Viola tricolor, a different species, and its posology does not transfer here. Educational reference only, not a prescription.

References

REF-1104, REF-1105, REF-1106, REF-1107, REF-1108, REF-1109, REF-1110, REF-1111, REF-1112, REF-1113, REF-2344, REF-2345, REF-2346, REF-0013, REF-2347, REF-2889, REF-2890, REF-2891, REF-2892, REF-2893, REF-2894, REF-2895, REF-2896, REF-2897, REF-2898, REF-2899, REF-2900, REF-2923, REF-2924, REF-2925, REF-2926, REF-2927, REF-2928, REF-2929, REF-2930, REF-2931, REF-2932, REF-2933, REF-2934

REF-1143, REF-1144, REF-1145, REF-1146, REF-1147, REF-1148, REF-1149, REF-1150, REF-1151, REF-1152

Drug Class Interactions

Safety note^{[43, 44]}Caution

Drug Class: hormonal-therapies

Mechanism: Red clover is rich in isoflavones that act like weak oestrogens; its safety alongside hormone medicines (such as the contraceptive pill, HRT, or breast-cancer hormone treatments like tamoxifen) or in hormone-sensitive conditions is not established, so combined use warrants caution and medical advice.

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-03

Safety note^{[14, 15]}Caution

Drug Class: sedatives-cns-depressants

Mechanism: Sweet violet is traditionally used as a calming, sedative herb; taken with sedatives, sleeping tablets or other central-nervous-system depressants (including alcohol) it may add to drowsiness and slowed reactions.

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-03

Lookalikes Review

Outcome: none-known

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-07

Outcome: has-lookalikes

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-07

Dangerous Lookalikes

Not documented

Safety note^[16]Irritant

Dangerous Plant: ficaria-verna

Confused Part: Low, heart-shaped spring leaves gathered as an edible; lesser celandine forms similar low leaves at the same time and place.

Confusion Context: Sweet violet (Viola odorata) is foraged in early spring for its heart-shaped leaves and flowers. Lesser celandine (Ficaria verna, fig buttercup) grows in the same season and habitat and, as foraging guidance warns, its low-growing leaves closely resemble violet; lesser celandine is toxic to humans in most stages (it contains the acrid irritant protoanemonin). Because their spring leaves are alike, this is a genuine early-season foraging hazard, although cooking destroys the toxin and the acrid taste discourages eating much.

Distinguishing Features: Flowers (decisive): sweet violet has purple (sometimes white) flowers with five uneven petals. Lesser celandine has glossy, bright-yellow star-like flowers with 8-12 petals. A yellow many-petalled flower means lesser celandine, never violet., Leaves: violet leaves are matt and heart-shaped on their own stalks from the base. Lesser celandine leaves are glossier and more kidney- to arrow-shaped, sometimes with pale mottling., Best practice: harvest violet leaves only once you can trace every leaf to a violet plant (ideally in flower), not to a yellow-flowered plant.

Key Test: Wait until the plant flowers, or trace each leaf to its flower. Purple five-petalled flowers with matt heart-shaped leaves = sweet violet. Glossy yellow flowers with 8-12 petals = lesser celandine - do not eat it raw. If you cannot confirm a violet flower, do not gather the leaves.

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-07

References & Sources

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Kanadys, W., Baranska, A., Jedrych, M., Religioni, U. and others (2019) 'Effects of red clover (Trifolium pratense) isoflavones on the lipid profile of perimenopausal and postmenopausal women-A systematic review and meta-analysis', Maturitas, 132, pp. 7-16. doi:10.1016/j.maturitas.2019.11.001 Meta-analysis / review
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Fritz, H., Seely, D., Flower, G., Skidmore, B., Fernandes, R., Vadeboncoeur, S., Kennedy, D., Cooley, K., Wong, R., Sagar, S., Sabri, E. and Fergusson, D (2013) 'Soy, red clover, and isoflavones and breast cancer: a systematic review', PLoS One, 8(11), pp. e81968. doi:10.1371/journal.pone.0081968 Meta-analysis / review
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Heger, T., Zatloukal, M., Kubala, M., Strnad, M. and others (2022) 'Procyanidin C1 from Viola odorata L. inhibits Na,K-ATPase', Scientific Reports, 12(1), pp. 7011. doi:10.1038/s41598-022-11086-y Preclinical
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Generated automatically from the Omnia Sana plant database and its cited sources. For educational purposes only — not medical advice. Always consult a qualified practitioner before using medicinal plants.