Chive

Chive (Allium schoenoprasum L.): A Comprehensive Encyclopedic Reference

1. Identity and Botanical Characterization

Taxonomic Identity

Chives, scientific name Allium schoenoprasum, is a species of flowering plant in the family Amaryllidaceae. A perennial plant, A. schoenoprasum is widespread in nature across much of Eurasia and North America, and it is the only species of Allium native to both the New World and the Old World. The genus name Allium comes from the classical Latin name for garlic, while the species name is derived from the Greek words "schoinos" meaning sedge or rush, and "prason" meaning leek, in reference to rush-like leeks. Its English name, chives, derives from the French word cive, from cepa, the Latin word for onion.

Chives are from the Amaryllidaceae family and native to a broad range of the temperate northern hemisphere, including northern United States, Canada, northern Europe, Mongolia, Japan, and almost all other northern hemispheric countries. In the wild, they often grow along riverbanks, meadows, and mountain slopes.

A closely related but botanically distinct species, Allium tuberosum, is commonly referred to as "garlic chive" or "Chinese chive." Garlic chives (A. tuberosum) are a perennial plant with a larger bulb, brighter green, flatter and more angular leaves, white flowers in the fall, and a garlic flavor. These two species share some overlapping traditional uses but differ in flavor, morphology, and phytochemistry; this article focuses primarily on common chives (Allium schoenoprasum), with relevant comparative notes on A. tuberosum where appropriate.

Morphology

Chives are a bulb-forming herbaceous perennial plant, growing to 25 centimetres (10 in) tall. The bulbs are slender, conical, 2–3 cm long and 1 cm broad, and grow in dense clusters from the roots. The scapes (or stems) are hollow and tubular, up to 50 cm long and 2–3 mm across, with a soft texture. Attractive, globular, clover-like clusters of pale purple flowers subtended by papery bracts appear in spring and summer on scapes often rising above the foliage to 18 inches tall.

Common Preparations and Forms

In culinary use, the scapes and the unopened, immature flower buds are diced and used as an ingredient for fish, potatoes, soups, and other dishes. Chives have edible flowers and leaves used for flavoring with eggs, soups, salads, butter, cheese, dips, and spreads. Fresh chives are typically used raw, as heat degrades their volatile organosulfur compounds. Dried chives are also commercially available, though drying substantially reduces the potency of the volatile compounds. Essential oils extracted by hydrodistillation of the aerial parts are studied in pharmacological research. The hydrodistillation process under suitable extracting conditions allows obtaining essential oil from the bulbs. Aqueous extracts, ethanol extracts, and freeze-dried preparations of bulb or leaf are used in laboratory and preclinical research settings.

2. Historical and Traditional Use

Ancient China

Chives are believed to have originated in Asia, particularly in China, where their culinary and medicinal uses were documented as early as 3000 BCE. In traditional Chinese medicine, chives were valued for their warming properties and were used to stimulate appetite, improve digestion, and treat fatigue. In traditional Chinese medicine, garlic chives (Allium tuberosum) have been utilized for their warming properties and are believed to support energy levels and digestive health. The seeds of A. tuberosum are reputedly used as a traditional Chinese medicine for treating both impotence and nocturnal emissions, and an extract preparation of its seeds possessing aphrodisiac property is used as a traditional remedy.

Ancient Rome and Mediterranean

Chives (Allium schoenoprasum) have been used medicinally for thousands of years. The Romans were prominent in using the herb's anti-inflammatory and curative properties, whereas some cultures believed chives to have magic powers and used them in fortune telling and to ward off disease and evil. The Romans believed chive plants could relieve the pain from sunburn or a sore throat, and ate them to increase blood pressure and act as a diuretic.

European Middle Ages and Renaissance

Chives have been used for over 5,000 years, with common chives, Allium schoenoprasum, being cultivated in Europe starting in the 5th century or early Middle Ages. During the Middle Ages, chives became widely used in European folk medicine, prized for their ability to alleviate various ailments.

The text titled The Herball or Generall Historie of Plantes, written by John Gerard in 1633, contains information on the historic medicinal uses of chives. According to Gerard, chives "attenuate or make thinne, open, [provoke] urine, ingender hot and grosse [vapors], and are [hurtful] to the eyes and [brain]."

By the Renaissance era, chives began to play a more significant role in European culinary traditions, especially in France. Here, chives became a crucial component of the classic French herb blend known as Fines Herbes. This delicate mixture typically combines subtly aromatic herbs such as chives, parsley, tarragon, and chervil.

European Folklore

Beyond their medicinal uses, chives were also intertwined with European folklore and beliefs. European folktales claimed that chives could ward off evil spirits and illnesses. Consequently, in some European countries, dried chives were often hung around homes to protect against malevolent forces. Historical records from ancient Greece and China suggest chive was used to support digestive health, stimulate appetite, and promote overall vitality. Folk remedies often involved the application of chive leaves or juice to wounds and insect bites, capitalizing on its mild antiseptic qualities.

Southeast Asia and Indonesia

In Indonesia, A. schoenoprasum is used to treat hypertension. Meanwhile, in East Asia, it is used to relieve flu and lung congestion.

3. Key Constituents and Active Compounds

Organosulfur Compounds

The defining phytochemical class in chives, as in all Allium species, is the organosulfur compounds. Chive is rich in organosulfur compounds, including the flavour precursor S-alk(en)ylcysteine sulfoxides — with isoalliin being the major compound in chive — and their degradative compounds such as thiosulfinates and polysulfides.

The bulb contains essential oil and sulfur compounds: alliin, isoalliin, dipropyl disulfide, methyl pentyl disulfide, cis-pentyl-hydrodisulfide, trans-pentyl-hydrodisulfide, 3,5-diethyl-1,2,4-trithiolane, and alkenyl-cysteine derivatives.

Analyses of the essential oil of A. schoenoprasum have revealed that the main class of constituents is the organosulfur compounds, representing around 60% of the analyzed oil. Chemical composition analysis of the bulb essential oil indicated that disulfide and trisulfide compounds, as major components, accounted for 97.53% of the identified compounds. One GC/MS study of leaf and root oils found five components in leaves (99.12% coverage) and four in roots (98.32%), with bis-(2-sulfhydryethyl)-disulfide as the major constituent at 72.06% of leaf oil and 56.47% of root oil.

When chive tissue is disrupted by cutting or crushing, the enzyme alliinase (EC 4.4.1.4) is released from vacuoles and converts the sulfoxide precursors into thiosulfinates. The thiosulfinates or alkane(ene) thial-S-oxides are formed by the action of the enzyme alliinase from their respective S-alk(en)yl cysteine sulfoxides. Depending on the Allium species and conditions, thiosulfinates can decompose to form additional sulfur constituents. Just like in other allium members, chives contain thiosulfonate antioxidants. Thiosulfonates such as diallyl disulfide, diallyl trisulfide, and allyl propyl disulfide convert to allicin by enzymatic reaction when leaves are disrupted by crushing or cutting.

Studies on chive have shown that the organosulfur compounds exhibit weak antioxidant activities by themselves. In contrast, phenolic compounds and ascorbic acid (AsA) were found to significantly contribute to the antioxidant activities in chive.

Flavonoids and Phenolic Compounds

Various studies highlight the presence in A. schoenoprasum of phenolic compounds, flavonoids such as kaempferol, quercetin, quercetol, isorhamnetin, and rutin, as well as anthocyanins. 3-β-D-glucosides of quercetin, kaempferol, and isorhamnetin have been found in the green leaves of A. schoenoprasum.

Leaf extracts of A. schoenoprasum from various studies have reported the presence of bis-(2-sulfhydryethyl)-disulfide, 2,4,5-trithiahexane, tris-(methylthio)methane, quercetin, kaempferol, myricetin, catechin, rutin, chlorogenic acid, p-coumaric acid, ferulic acid, caffeic acid, sitosterol, stigmasterol, campesterol, cholesterol, free fatty acids, monoacylglycerol, and diacylglycerol.

Research on post-harvest chive tissue showed that the round green part of the leaf exhibited significantly higher contents of phenolic compounds, increased enzyme activities, and enhanced antioxidant activities compared to the basal white part, indicating that phenolic compounds are mainly synthesised in the green leaf portion.

Carotenoids and Vitamins

Chives are particularly rich in vitamin C, vitamin A (as β-carotene), and lutein. Chives contain more vitamin A than any other allium family member vegetables; 100 g of fresh leaves contain 4,353 IU of vitamin A or 145% of daily recommended levels. 100 g of fresh greens provide 212.7 µg, or about 177% of daily recommended intake, of vitamin K. Chives contain lutein and zeaxanthin, which are carotenoids. According to some research, lutein and zeaxanthin accumulate in the retina of the eye to help prevent age-related macular degeneration, meaning that eating foods rich in these substances could benefit eyesight.

Minerals

Chives are nutrient-dense, high in vitamin C (58.1 mg, 97% DV), calcium (83 mg), and folate (26% DV), which helps in immunity and bone health. Minerals present include potassium (296 mg), calcium (92 mg), phosphorus (58 mg), magnesium (42 mg), sodium, iron, zinc, copper, manganese, and selenium per 100 g.

Saponins and Steroidal Glycosides

Phytochemical studies of A. schoenoprasum have revealed the presence of sulphur and phenolic compounds, flavonoids, saponin, and steroidal glycosides. The Allium genus contains substantial amounts of steroidal saponins, which have been shown to exhibit cytotoxic, enzyme-inhibitory, and antifungal effects. Steroidal saponins have been identified in more than 40 different Allium species.

4. Mechanisms of Action

Antimicrobial Activity

The characteristic phytocompounds that contribute to the antimicrobial activity of alliums include allicin, ajoene, allyl alcohol, and some diallyl sulfides. The essential oils of Allium plants are believed to have antimicrobial and antioxidant activities, which are mostly associated with their sulfur compounds. In a study of six Allium essential oils, antibacterial properties of chive essential oil were tested on five food-borne pathogens: Staphylococcus aureus, Listeria monocytogenes, Salmonella Typhimurium, Escherichia coli, and Campylobacter jejuni. The bulb essential oil of A. schoenoprasum was found to provide strong antibacterial activity against E. coli, methicillin-resistant Staphylococcus aureus, methicillin-sensitive Staphylococcus aureus, and moderate inhibition activity against carbapenem-resistant Pseudomonas aeruginosa and Streptococcus pneumoniae.

Antioxidant Mechanisms

Different parts of chives, including the bulb, leaf, and stalk, contain antioxidant compounds such as phenolic compounds, flavonoids, chlorophylls a and b, carotenoids, and vitamin C. Leaf extract shows the most antioxidant property. These compounds boost antioxidant enzymes like superoxide dismutase, catalase, peroxidase, and glutathione peroxidase. Evaluation of total phenolic content and antioxidant properties of A. schoenoprasum using the Folin–Ciocalteu reagent and DPPH revealed an antioxidant activity ranging from 12.29% to 76.57%, and chives possess a high total phenolic content and antioxidant activity, while white onions have the least.

Anti-inflammatory Mechanisms

Anti-inflammatory effects of Allium organosulfur compounds work by lowering inflammation and modulating pro-inflammatory cytokines to restore balance. In a preclinical study, to test the anti-inflammatory effects of extracts from A. schoenoprasum leaves using a turpentine oil-induced inflammation model in rats, there was an inhibition of phagocytosis through the reduction of nitro-oxidative stress.

Cardiovascular Mechanisms

Cardioprotective effects of Allium compounds are linked to quercetin and kaempferol, including the ability to lower blood pressure and reduce cholesterol levels, supporting overall heart health. Laboratory studies show that allicin reduces cholesterol production by inhibiting the HMG-CoA reductase enzyme in liver cells. Allicin, a sulfur-containing compound found in chives, has been shown to relax blood vessels by promoting the release of nitric oxide, which improves blood flow and reduces blood vessel stiffness, thereby helping lower blood pressure and enhancing overall cardiovascular health.

Anticancer Mechanisms

Allicin, flavonoids, and organosulfur compounds (OSCs) exhibit notable antioxidant and anticancer properties, affecting apoptosis induction, cell cycle arrest, and the inhibition of tumor proliferation. These studies highlight potential mechanisms of individual sulfur-containing compounds and of various preparations and extracts of these vegetables, including decreased bioactivation of carcinogens, antimicrobial activities, and redox modification.

5. Scientific Evidence by Area of Use

5.1 Antimicrobial Activity

Evidence level: Primarily in vitro (cell/lab-based); limited to no human clinical trials specific to chives.

The obtained essential oil from A. schoenoprasum bulbs exhibited high antioxidant activity, significantly higher than that of ascorbic acid in the DPPH radical test, and provided strong antibacterial activity against E. coli, methicillin-resistant Staphylococcus aureus, methicillin-sensitive Staphylococcus aureus, and moderate inhibition against carbapenem-resistant Pseudomonas aeruginosa and Streptococcus pneumoniae. These results are from an in vitro laboratory study and cannot be directly extrapolated to clinical outcomes in humans. Further, allicin was also found to have antibacterial, antiviral, and anti-fungal activities in laboratory studies.

5.2 Antioxidant Activity

Evidence level: In vitro studies; no human interventional trials specific to chives.

Chive (Allium schoenoprasum L.) has a strong antioxidant property as it contains abundant phenolic compounds and ascorbic acid. Allium species, including Allium schoenoprasum, have strong antioxidative properties due to high concentrations of total flavonoids, carotenoids, and chlorophylls, which help reduce toxic oxygen radicals and may prevent cardiovascular diseases. These findings are based on in vitro assays; their translation to human health benefit has not been established in controlled clinical trials specific to chives.

5.3 Anti-inflammatory Activity

Evidence level: Animal models only; no human clinical trials.

In a study by Parvu et al. (2014), to test the anti-inflammatory effects of extracts from A. schoenoprasum leaves using a turpentine oil-induced inflammation model in rats, there was an inhibition of phagocytosis through the reduction of nitro-oxidative stress. Studies report prominent in vitro anti-inflammatory activity for several Allium species; however, in vivo replications of such results have been achieved for all species except A. schoenoprasum. This is a significant limitation: as of the most recent available literature, anti-inflammatory activity for chives specifically has not been confirmed in human trials.

5.4 Cardiovascular and Antihypertensive Effects

Evidence level: Preclinical (animal) studies for chives specifically; broader epidemiological and some clinical data for the Allium family.

An investigation supported the traditional belief that Allium schoenoprasum (chives) have antihypertensive properties. In a study by Yılmaz Koçak and Ufuk Mercan Yücel, using Allium schoenoprasum extract against carbon tetrachloride (CCl4)-induced hepatotoxicity in rats, there was a decrease in total cholesterol, low-density lipoprotein, very-low-density lipoprotein (VLDL), and triglyceride levels. Administration of doses of Allium schoenoprasum in male streptozotocin-induced diabetic rats caused a decrease in serum glucose, serum triglyceride, and LDL-cholesterol levels, and an increase in serum HDL-cholesterol (Roghani et al., 2010). These are animal model findings and have not been replicated in human clinical trials specific to chives.

At the broader Allium genus level, the Allium genus, especially garlic, onion, and Chinese chive, is rich in organosulfur compounds, quercetin, flavonoids, and saponins, which have anticancer, preventive cardiovascular and heart disease, anti-inflammation, antiobesity, antidiabetes, antioxidant, antimicrobial, neuroprotective, and immunological effects.

5.5 Anticancer Potential

Evidence level: Epidemiological associations (Allium genus broadly); in vitro mechanistic data; no human clinical trials for chives specifically.

Epidemiological studies, while limited in their ability to assess Allium consumption specifically, indicate some associations of Allium vegetable consumption with decreased risk of cancer, particularly cancers of the gastrointestinal tract. Limited intervention studies have been conducted to support these associations. The majority of supportive evidence on Allium vegetable cancer-preventive effects comes from mechanistic studies. Although allium vegetables may help prevent cancer, more research has looked into the effects of garlic and onion on cancer than those of chives. Researchers therefore need to conduct more studies before they can determine the amount a person needs to eat for this effect and the relative effectiveness of other interventions.

Bioactive constituents from A. schoenoprasum have anticancer activity, but evidence is confined to in vitro studies. Allium vegetables and their components have effects at each stage of carcinogenesis and affect many biological processes that modify cancer risk, but this body of research is dominated by garlic and onion studies rather than chives in isolation.

5.6 Bone Health

Evidence level: Indirect nutritional evidence (vitamin K content); no chive-specific clinical trials.

Chives contain vitamin K, which is important for bone health and blood clotting. Scientific studies suggest that vitamin K has a potential role in bone health by promoting osteoblastic (bone formation and strengthening) activity. The relevance of chive consumption specifically to bone health outcomes in humans has not been studied in controlled trials.

5.7 Digestive Health

Evidence level: Traditional use; no human clinical trials.

The genus Allium, comprising several hundred species, is an important food plant that is widely utilised as a drug in folk and modern medicine for its anti-microbial, lipid-lowering, cardiovascular, hypocholesterolaemic, anti-thrombotic, hypoglycaemic and anti-tumorigenic activities. Digestive support is among the most historically consistent uses across cultures, yet it remains supported primarily by traditional documentation and the plausibility of the sulfur compound and fiber content, rather than prospective clinical studies.

5.8 Anthelmintic (Antiparasitic) Activity

Evidence level: Preclinical; listed in phytochemistry reviews.

Scientific evaluation of chives validates its traditional claims and demonstrates diverse pharmacological potential including anti-inflammatory, anticancer, antioxidant, anthelmintic, and antihypertensive activities. Anthelmintic effects are recognized in the literature as part of the documented pharmacological profile of A. schoenoprasum, though the mechanistic and clinical evidence base for this specific activity remains sparse.

5.9 Respiratory Activity

Evidence level: Preclinical only.

In a TRAMIL network study, the aqueous extract (infusion) of chopped and toasted chive bulb, freeze-dried (20.7 g/100 mL water), in tracheal rings of female Sprague Dawley rats in a bronchodilation model, caused 50 ± 2.8% and 93.2 ± 6.8% relaxation at concentrations of 4.59 and 9.17 mg/mL, respectively. The results were statistically significant and dose-dependent. This is an animal tissue study; its relevance to human respiratory conditions has not been evaluated clinically.

6. Body Systems and Health Areas

Based on the available body of preclinical, nutritional, and epidemiological literature, Allium schoenoprasum has been studied or traditionally employed in relation to the following body systems:

• Cardiovascular system: Cardioprotective effects linked to quercetin and kaempferol, including the ability to lower blood pressure and reduce cholesterol levels.
• Immune and antimicrobial: Antimicrobial effects primarily mediated by allicin and propyl thiosulfinate, involving the inhibition of bacteria and a general capacity to fight infection.
• Musculoskeletal / bone: High vitamin K content associated with osteoblastic activity.
• Gastrointestinal: Traditional use for digestive support and appetite stimulation; fiber content supports bowel function.
• Ocular: Lutein and zeaxanthin accumulate in the retina of the eye to help prevent age-related macular degeneration, meaning that eating foods rich in these substances could benefit eyesight.
• Endocrine / metabolic: Preclinical evidence for blood glucose and lipid modulation in animal models of diabetes.
• Oncological (preventive context): The majority of supportive evidence on Allium vegetable cancer-preventive effects comes from mechanistic studies, principally in vitro and epidemiological.
• Respiratory: Preclinical bronchodilatory activity observed in animal tissue models.
• Neurological: Folate content associated with neurotransmitter metabolism; vitamin K has been explored in relation to neuronal health.

7. Dosage Forms and Dosages Reported in Studies

There are no standardized therapeutic dosage recommendations for chive as a medicinal supplement established by major regulatory or pharmacopoeial bodies. The following dosages are reported in specific preclinical studies only:

• In vitro bronchodilation (TRAMIL aqueous extract, animal tracheal rings): Freeze-dried aqueous extract of toasted bulb at 4.59 mg/mL and 9.17 mg/mL in tracheal ring preparations.
• In vivo antidiabetic / lipid-lowering (animal): Administration of doses of Allium schoenoprasum in male streptozotocin-induced diabetic rats. Specific dosage quantities were not fully reported in the available source text.
• Essential oil yield (extraction reference): The hydrodistillation process allowed obtaining a highest essential oil yield of 0.290 ± 0.003% from the bulb.
• Culinary/dietary serving: A common culinary serving is about 1 tablespoon (tbsp), or 3 grams of fresh chopped chives. To obtain a significant amount of nutritional constituents from this source, a person would have to eat a large quantity of chives relative to typical use as a garnish.

Evidence for therapeutic applications is primarily preclinical (in vitro and animal), with epidemiological support from allium family studies; human clinical trials are limited, and any proposed benefits require more rigorous confirmation before therapeutic dosing can be established.

8. Safety Considerations and Interactions

General Safety

Chive is widely consumed as a food and culinary herb across global cultures and has a long, well-established history of safe use as a dietary ingredient. Research confirms the medicinal importance of A. schoenoprasum and notes that future research on its unexplored aspects, especially identification of bioactive compounds and related mechanisms and safety, would help develop it as a drug. Systematic toxicological data specific to chives as an isolated supplement are limited.

While chives are generally safe to consume, excessive intake can lead to digestive issues such as gas, bloating, and acid reflux.

Allergy and Hypersensitivity

Chives are not a common source of food allergies, though people with allergies or intolerances to onions or other allium vegetables may also need to avoid chives.

Interaction with Anticoagulant Medications (Vitamin K / Warfarin)

Chives contain vitamin K, which may interfere with anticoagulant medications such as warfarin. Consistent intake is important to avoid fluctuations in blood clotting response. This is not unique to chives but reflects the general principle that dietary vitamin K intake affects the pharmacodynamics of vitamin K antagonist anticoagulants. Substances such as vitamin K can counteract warfarin's blood-thinning properties.

Interaction with Antiplatelet and Blood-Thinning Agents

Garlic (Allium sativum) poses bleeding risks with warfarin. Given that chives share related organosulfur compounds with garlic, a theoretical concern exists regarding additive antiplatelet effects in combination with blood-thinning medications, though direct clinical evidence for this interaction specific to chives is not established in the available literature.

Toxicity to Companion Animals

Chives are toxic to cats and dogs. Ingestion can cause vomiting, drooling, abdominal pain, and, in severe cases, anemia due to damage to red blood cells. This toxicity applies to the whole Allium genus in these species and is a well-documented veterinary concern.

Evidence Strength Summary

Across the body of scientific literature, the evidence base for chive as a therapeutic agent is predominantly preliminary. A 2017 review published in Natural Product Research (PubMed PMID: 28826254) emphasized phytochemistry and pharmacological activities of A. schoenoprasum, noting that scientific evaluation validates its traditional claims and demonstrates diverse pharmacological potential including anti-inflammatory, anticancer, antioxidant, anthelmintic, and antihypertensive activity. However, while phytochemical studies have revealed the presence of sulphur and phenolic compounds, flavonoids, saponin, and steroidal glycosides, methodical research to identify bioactive compounds is still required, and future research on its unexplored aspects — especially identification of bioactive compounds, related mechanisms, and safety — is needed. No randomized controlled human clinical trials of therapeutic chive preparations have been identified in the indexed literature. All quantified biological activity data for A. schoenoprasum specifically originate from in vitro or animal studies, with broader epidemiological associations derived from studies of the Allium family as a whole.

References

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