Plant Profile

Parsley

Compiled by the Omnia Sana editorial team from the plant database ·Last updated August 15, 2026

Petroselinum crispum

Family: Apiaceae · Parts used: Leaf, root and seed · Also known as: Garden parsley, Curly parsley

The complete database record: 4 documented constituents, 6 pharmacological actions, 9 traditional / indicated uses, with 19 cited sources.

Botanical Description

Biennial herb (Apiaceae), usually grown as an annual, 20-60 cm tall, with a slender taproot. Leaves are bright green and finely divided, either flat or tightly curled ('crisped') depending on variety. In the second year, small yellow-green flowers are borne in compound umbels, followed by small, ridged fruit (the 'seed').^[11]

Height: 20-60 cm

Habit: Biennial herb (usually cultivated as an annual)

Leaves: Bright green, finely divided, flat or curled ('crisped')

Flowers: Small, yellow-green, in compound umbels (second year)

Stem: Erect, branched (second-year flowering stem)

Root: Slender taproot (thickened in root-parsley varieties)

Fruit: Small, ridged, aromatic fruit ("seed")

Flowering Period: Second year, June-August

Habitat & Distribution

Native to the central Mediterranean (Sardinia and southern Italy), long cultivated worldwide as a culinary and medicinal herb in gardens and as a field crop.^[11]

Harvesting

Leaves are picked fresh throughout the growing season; the root (of root-parsley varieties) is lifted in autumn; the seed (fruit) is collected from second-year plants once ripe and dry - it is used mainly in medicinal/aromatic preparations rather than food, given its higher concentration of the toxic essential-oil constituents apiole and myristicin.^[11]

Parts: Leaf, Root, Seed

Season: Leaf throughout the growing season; root in autumn; seed once ripe (second year)

Key Constituents

Flavonoids (apigenin) and other phenolics^{[1, 11, 12]}

Antioxidant and anti-inflammatory constituents.

FlavonoidsPhenolic compoundsApigenin

Essential oil (apiole and myristicin)^[11]

Aromatic constituents that drive the diuretic action but are toxic in large amounts.

Essential (volatile) oil

Furanocoumarins (bergapten, imperatorin)^[12]

Photosensitising constituents; the basis for the mild phototoxicity caution.

Coumarins

Vitamin C and carotenoids^[11]

Nutritive antioxidant constituents.

Carotenoids

Pharmacological Actions

Antioxidant^{[1, 2, 4, 5, 9, 10, 11, 12]}

Antioxidant, nephroprotective and hepatoprotective

Carminative^[11]

Carminative digestive and stomach tonic (bloating, indigestion)

Digestive aid^{[6, 7, 11]}

Carminative digestive and stomach tonic (bloating, indigestion)

Diuretic^{[11, 12, 15]}

Diuretic - reduces fluid retention/swelling and supports urinary and kidney function (traditionally used for urinary stones); animal studies attribute the effect to inhibition of the renal Na+/K+ pump, raising urine flow

Hepatoprotective (liver support)^{[3, 5, 8, 11, 12]}

Antioxidant, nephroprotective and hepatoprotective

Nephroprotective (kidney support)^{[9, 11, 12]}

Antioxidant, nephroprotective and hepatoprotective

Traditional & Indicated Uses

Bad breath^[11]Moderate · 5/10

Breath freshener (chlorophyll-rich; traditional for bad breath)

Evidence: 5

Label: Bad breath

more plants for bad breath →detailed sources →

Bloating^[11]Moderate · 5/10

Carminative digestive and stomach tonic (bloating, indigestion)

Mechanistic Exclude Ids: REF-1492

Evidence: 5

Label: Bloating

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Detox / cleansing^{[11, 12]}Moderate · 5/10

inferred from hepatoprotective action

Evidence: 5

Label: Detox / cleansing

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Indigestion^[11]Moderate · 5/10

Carminative digestive and stomach tonic (bloating, indigestion)

Evidence: 5

Label: Indigestion

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Kidney support^{[11, 12]}Moderate · 5/10

inferred from nephroprotective action

Mechanistic Exclude Ids: REF-1494

Evidence: 5

Label: Kidney support

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Liver support^{[3, 11, 12]}Moderate · 5/10

inferred from hepatoprotective action

Evidence: 5

Label: Liver support

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Swelling / fluid retention^{[11, 12, 15]}Moderate · 5/10

Evidence: 5

Label: Swelling / fluid retention

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Urinary support^{[11, 12, 15]}Moderate · 5/10

inferred from diuretic action

Evidence: 5

Label: Urinary support

more plants for urinary support →detailed sources →

Urinary tract infection (UTI)^{[11, 12, 15]}Moderate · 5/10

inferred from diuretic action

Evidence: 5

Label: Urinary tract infection (UTI)

more plants for urinary tract infection (uti) →detailed sources →

Traditional Use & History

Parsley has a long Mediterranean culinary-medicinal tradition as a carminative digestive tonic, breath freshener and mild diuretic traditionally used for urinary complaints and fluid retention. Modern research supports antioxidant, hepatoprotective, nephroprotective and diuretic activity.^{[11, 12]}

Preparations

Fresh leaf^[11]

Eaten fresh as a garnish or herb - a traditional daily digestive and breath-freshening support.

Infusion (tea)^[11]

Dried leaf or crushed seed steeped in hot water, a traditional diuretic and digestive preparation.

Dosage

Leaf infusion^[11]

Culinary amounts of leaf are food-safe; medicinal use should stick to modest infusion amounts (roughly 2-4 g dried leaf or root per cup, a few times daily). Avoid concentrated seed extract or essential oil, which are toxic and uterine-stimulant at higher doses, and avoid medicinal doses entirely in pregnancy. Educational reference only, not a prescription.

Safety, Cautions & Contraindications

Safety note^[11]Caution

Culinary amounts are safe, but medicinal/seed doses and the essential oil (apiole, myristicin) can be toxic and stimulate the uterus - AVOID medicinal doses of parsley in pregnancy.

Safety note^{[11, 12]}Caution

Its diuretic action means caution alongside diuretic medicines; the furanocoumarins can cause mild photosensitivity, and concentrated use should be avoided in active kidney disease.

Dangerous Lookalikes

Conium Maculatum^{[16, 17]}Fatal

Confused Part: Leaves and stems (foliage); the divided leaves resemble flat-leaf parsley, especially before flowering.

Confusion Context: Poison hemlock is in the same family as parsley and its foliage is often described as parsley- or carrot-top-like; it can be confused with edible parsley-family plants. Its alkaloid coniine causes a paralysis that stops breathing, and eating even a small amount of any part can be fatal.

Distinguishing Features: Poison hemlock stems are smooth, hairless and marked with purple or red spots and streaks; garden parsley stems have no purple blotching., Crushed poison hemlock smells foul and musty ('mousy'); parsley smells clean and pleasantly herby., Poison hemlock grows tall (often 1.5 to 3 m) with hollow stems; culinary parsley is a low herb.

Key Test: Inspect the stem: hairless and smooth with purple or red spots and streaks = poison hemlock - do not eat. Confirm with the crushed-plant smell (foul and mousy versus parsley's pleasant herb scent).

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-06

Aethusa Cynapium^{[18, 19]}Dangerous

Confused Part: Leaves and foliage; the finely divided glossy leaves closely resemble flat-leaf (Italian) parsley - the origin of the name 'fool's parsley'.

Confusion Context: Named directly for the confusion with parsley, fool's parsley contains toxic polyacetylenes; poisoning causes burning in the mouth and throat and gastrointestinal and neurological effects, and it is especially a risk to children.

Distinguishing Features: In flower, each little umbel of fool's parsley has three or four long, narrow bracteoles hanging downward beneath it (a 'beard'); true parsley has no such long drooping bracteoles., Crushed fool's parsley smells foul, acrid and mousy; parsley smells clean and pleasantly herby., Fool's parsley leaves are hairless, more finely divided, and darker and glossier than culinary parsley.

Key Test: Look under the flower clusters for three or four long, downward-hanging bracteoles (a 'beard') - present in fool's parsley, absent in true parsley - and cross-check the foul mousy smell versus parsley's pleasant scent. If a parsley-like plant only smells 'off' and isn't flowering, don't use it without expert confirmation.

Reviewed By: Omnia Sana (owner-authorized)

Reviewed Date: 2026-07-06

Harvest Readiness

^[13]

Part: leaf

Signals: Pick the leaves regularly through the growing season, to encourage fresh growth.

Basis: traditional

Source Quote: The leaves should be harvested regularly in order to encourage fresh growth and get maximum yields

Species Confirmed: 1

Notes: PFAF (REF-3307); the leaves are picked regularly through the growing season. Single lineage -> provisional. SAFETY: parsley foliage resembles the fatal Conium maculatum (poison hemlock) - confirm identity before wild-gathering; see Dangerous Lookalikes.

^[13]

Part: seed

Signals: Collect the seeds when they ripen on the second-year umbels, in mid-to-late summer.

Basis: traditional

Source Quote: the seeds ripen from July to September

Species Confirmed: 1

Notes: PFAF (REF-3307); the seeds ripen July-September on the second-year plant. Single lineage -> provisional.

^[14]

Part: root

Signals: Lift the taproot at the end of the first season's growth, once it has swollen to roughly 12-15 cm and comes up easily on a fork.

Basis: traditional

Source Quote: Harvest the roots when they are 12 - 15cm long and can be easily lifted with a fork.

Species Confirmed: 1

Notes: Plantura growing guide for turnip-rooted (Hamburg) parsley, Petroselinum crispum var. tuberosum (REF-3381) - a variety of this species, so the binomial holds. The same page places readiness 'from late autumn through winter, depending on when the seeds were sown', which is why the sourced signal here is root size and liftability rather than a date. Supersedes the earlier dead end (PFAF gave no root timing). Single lineage -> provisional. SAFETY: poison hemlock (Conium maculatum) is a fatal lookalike - confirm identity before digging, see Dangerous Lookalikes.

External Identifiers

GBIF ›Wikidata ›

References & Sources

Ebrahimi, P., Bayram, I., Lante, A. and Decker, E.A (2024) 'Acid-hydrolyzed phenolic extract of parsley (Petroselinum crispum L.) leaves inhibits lipid oxidation in soybean oil-in-water emulsions', Food Research International, 187, pp. 114452. doi:10.1016/j.foodres.2024.114452 Preclinical
https://doi.org/10.1016/j.foodres.2024.114452
Ertik, O., Pazarbasi, S.E., Sener, G. and Sacan, O (2023) 'Petroselinum crispum Extract Prevents Scopolamine-Induced Lens Damage in Rats', Chemistry & Biodiversity, 20(11), pp. e202300776. doi:10.1002/cbdv.202300776 Preclinical
https://doi.org/10.1002/cbdv.202300776
Ede, S., Ozbeyli, D., Erdogan, O., Cevik, O. and others (2023) 'Hepatoprotective effects of parsley (Petroselinum crispum) extract in rats with bile duct ligation', Arab Journal of Gastroenterology, 24(1), pp. 45-51. doi:10.1016/j.ajg.2022.10.006 Preclinical
https://doi.org/10.1016/j.ajg.2022.10.006
Mara de Menezes Epifanio, N., Rykiel Iglesias Cavalcanti, L., Falcao Dos Santos, K., Soares Coutinho Duarte, P. and others (2020) 'Chemical characterization and in vivo antioxidant activity of parsley (Petroselinum crispum) aqueous extract', Food & Function, 11(6), pp. 5346-5356. doi:10.1039/d0fo00484g Preclinical
https://doi.org/10.1039/d0fo00484g
Ozsoy-Sacan, O., Yanardag, R., Orak, H., Ozgey, Y. and others (2006) 'Effects of parsley (Petroselinum crispum) extract versus glibornuride on the liver of streptozotocin-induced diabetic rats', Journal of Ethnopharmacology, 104(1-2), pp. 175-181. doi:10.1016/j.jep.2005.08.069 Preclinical
https://doi.org/10.1016/j.jep.2005.08.069
Moazedi, A.A., Mirzaie, D.N., Seyyednejad, S.M., Zadkarami, M.R. and others (2007) 'Spasmolytic effect of Petroselinum crispum (Parsley) on rat's ileum at different calcium chloride concentrations', Pakistan Journal of Biological Sciences, 10(22), pp. 4036-4042. doi:10.3923/pjbs.2007.4036.4042 Preclinical
https://doi.org/10.3923/pjbs.2007.4036.4042
Al-Howiriny, T., Al-Sohaibani, M., El-Tahir, K. and Rafatullah, S (2003) 'Prevention of experimentally-induced gastric ulcers in rats by an ethanolic extract of 'Parsley' Petroselinum crispum', The American Journal of Chinese Medicine, 31(5), pp. 699-711. doi:10.1142/S0192415X03001405 Preclinical
https://doi.org/10.1142/S0192415X03001405
Nair, V.Y., Balakrishanan, N. and Antony Santiago, J.V (2015) 'Petroselinum crispum extract attenuates hepatic steatosis in rats fed with fructose enriched diet', Bratislava Medical Journal, 116(9), pp. 547-553. doi:10.4149/bll_2015_108 Preclinical
https://doi.org/10.4149/bll_2015_108
Maodaa, S.N., Allam, A.A., Ajarem, J., Abdel-Maksoud, M.A. and others (2016) 'Effect of parsley (Petroselinum crispum, Apiaceae) juice against cadmium neurotoxicity in albino mice', Behavioral and Brain Functions, 12(1), pp. 6. doi:10.1186/s12993-016-0090-3 Preclinical
https://doi.org/10.1186/s12993-016-0090-3
Ganea, M., Vicas, L.G., Gligor, O., Sarac, I. and others (2024) 'Exploring the Therapeutic Efficacy of Parsley (Petroselinum crispum Mill.) as a Functional Food: Implications in Immunological Tolerability, Reduction of Muscle Cramps, and Treatment of Dermatitis', Molecules, 29(3), pp. 608. doi:10.3390/molecules29030608 Preclinical
https://doi.org/10.3390/molecules29030608
Bahramsoltani, R., Ahmadian, R., Daglia, M. and Rahimi, R (2024) 'Petroselinum crispum (Mill.) Fuss (Parsley): An Updated Review of the Traditional Uses, Phytochemistry, and Pharmacology', Journal of Agricultural and Food Chemistry. doi:10.1021/acs.jafc.3c06429 Randomized trial
https://doi.org/10.1021/acs.jafc.3c06429
Mahmood, S. and Hussain, S. and Malik, F (2014) 'Critique of medicinal conspicuousness of Parsley (Petroselinum crispum): a culinary herb of Mediterranean region', Pakistan Journal of Pharmaceutical Sciences, 27(1), pp. 193--202. Preclinical
https://scholar.google.com/scholar?q=Critique%20of%20medicinal%20conspicuousness%20of%20Parsley%20%28Petroselinum%20crispum%29%3A%20a%20culinary%20herb%20of%20Mediterranean%20region
Plants For A Future 'Petroselinum crispum (Parsley)'. Available at: https://pfaf.org/user/Plant.aspx?LatinName=Petroselinum+crispum Traditional / reference
https://pfaf.org/user/Plant.aspx?LatinName=Petroselinum+crispum
Plantura 'Parsley root: how to grow at home'. Available at: https://plantura.garden/uk/herbs/parsley/parsley-root Traditional / reference
https://plantura.garden/uk/herbs/parsley/parsley-root
Kreydiyyeh, S.I. and Usta, J (2002) 'Diuretic effect and mechanism of action of parsley', Journal of Ethnopharmacology, 79(3), pp. 353--357. doi:10.1016/s0378-8741(01)00408-1 Traditional / reference
https://doi.org/10.1016/s0378-8741(01)00408-1
Dayan, A.D (2024) 'Death of Socrates: a likely case of poison hemlock (Conium maculatum) poisoning', Clinical Toxicology (Philadelphia, Pa.), 62(1), pp. 56-60. doi:10.1080/15563650.2024.2309328 Clinical study
https://doi.org/10.1080/15563650.2024.2309328
King County Noxious Weeds (2024) 'Poison hemlock (Conium maculatum) identification and control'. Available at: https://kingcounty.gov/en/dept/dnrp/nature-recreation/environment-ecology-conservation/noxious-weeds/identification-control/poison-hemlock Traditional / reference
https://kingcounty.gov/en/dept/dnrp/nature-recreation/environment-ecology-conservation/noxious-weeds/identification-control/poison-hemlock
Teuscher, E. and Greger, H. and Adrian, V (1990) 'Toxicity of Aethusa cynapium L. (fool's parsley)', Pharmazie, 45(7), pp. 537-8. Available at: https://pubmed.ncbi.nlm.nih.gov/2236201/ Preclinical
https://pubmed.ncbi.nlm.nih.gov/2236201/
Minnesota Wildflowers (2024) 'Aethusa cynapium (Fool's Parsley)'. Available at: https://www.minnesotawildflowers.info/flower/fools-parsley Traditional / reference
https://www.minnesotawildflowers.info/flower/fools-parsley

Selected studies & references

RctPetroselinum crispum (Mill.) Fuss (Parsley): An Updated Review of the Traditional Uses, Phytochemistry, and Pharmacology source↗ (2024)

PreclinicalAcid-hydrolyzed phenolic extract of parsley (Petroselinum crispum L.) leaves inhibits lipid oxidation in soybean oil-in-water emulsions source↗ (2024)

PreclinicalExploring the Therapeutic Efficacy of Parsley (Petroselinum crispum Mill.) as a Functional Food: Implications in Immunological Tolerability, Reduction of Muscle Cramps, and Treatment of Dermatitis source↗ (2024)

PreclinicalHepatoprotective effects of parsley (Petroselinum crispum) extract in rats with bile duct ligation source↗ (2023)

PreclinicalPetroselinum crispum Extract Prevents Scopolamine-Induced Lens Damage in Rats source↗ (2023)

PreclinicalChemical characterization and in vivo antioxidant activity of parsley (Petroselinum crispum) aqueous extract source↗ (2020)

PreclinicalEffect of parsley (Petroselinum crispum, Apiaceae) juice against cadmium neurotoxicity in albino mice source↗ (2016)

PreclinicalPetroselinum crispum extract attenuates hepatic steatosis in rats fed with fructose enriched diet source↗ (2015)

All 13 studies in the Knowledge Finder →

Educational use only. This profile summarises traditional and scientific sources for reference. It is not medical advice and not a substitute for a qualified practitioner. Some plants carry safety cautions and drug interactions - always check before use.
This profile is assembled automatically from the Omnia Sana plant database, which we curate by hand. How this site is built.

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