Cebolleta (Allium fistulosum)

Cebolleta (Allium fistulosum) contains bioactive compounds including Onionin A1 and flavonoids like quercetin that demonstrate anti-inflammatory and antioxidant properties. The primary mechanism involves inhibition of inflammatory cytokine expression and free radical scavenging activity.

Origin & History

Cebolleta (Allium fistulosum), also known as Welsh onion or Japanese bunching onion, is a perennial bulbous plant in the Liliaceae family native to Asia. The ingredient is derived from the whole plant—including bulbs, leaves, and roots—typically processed as ethanolic extracts, powders, or fresh preparations.

Historical & Cultural Context

No information about traditional medicine use, cultural applications, or historical usage duration was provided in the research dossier. Additional sources would be needed to document traditional use patterns.

Health Benefits

• Anti-inflammatory activity supported by in vitro studies showing Onionin A1 inhibits IL-10-induced CD163 expression (preliminary evidence only)
• Antioxidant potential attributed to high flavonoid content including quercetin, kaempferol, and unique compounds isoquercitrin and quercitrin (in vitro evidence)
• Antimicrobial properties demonstrated in laboratory studies (no human clinical data available)
• Potential anti-obesity effects suggested by pharmacological analyses (preliminary evidence only)
• Immunomodulatory activity indicated through furostanol saponins and cinnamic acid derivatives (in vitro studies only)

How It Works

Onionin A1 specifically inhibits IL-10-induced CD163 expression, reducing inflammatory responses in immune cells. The flavonoid compounds quercetin, kaempferol, isoquercitrin, and quercitrin neutralize reactive oxygen species through electron donation and metal chelation. These mechanisms collectively modulate inflammatory pathways and oxidative stress responses at the cellular level.

Scientific Research

The available research consists primarily of phytochemical analyses and in vitro pharmacological studies rather than human clinical trials. No randomized controlled trials (RCTs), meta-analyses, or studies with PubMed PMIDs were found in the provided research dossier. All therapeutic claims are based on laboratory studies examining cellular and molecular mechanisms.

Clinical Summary

Current evidence for cebolleta is limited to preliminary in vitro studies examining specific bioactive compounds. Laboratory studies have demonstrated Onionin A1's ability to inhibit inflammatory marker expression, while flavonoid analysis confirms antioxidant potential in cell-free systems. No human clinical trials have been conducted to establish therapeutic dosages or clinical efficacy. The evidence remains at the preclinical stage and requires human studies for validation.

Nutritional Profile

Allium fistulosum (Welsh onion/cebolleta) per 100g fresh weight: Macronutrients — Calories ~32 kcal, Carbohydrates ~7.3g (of which sugars ~2.3g), Dietary fiber ~2.6g (soluble and insoluble fractions), Protein ~1.8g (containing sulfur-containing amino acids including cysteine and methionine precursors), Fat ~0.2g. Micronutrients — Vitamin C: 18–27mg (notably lower than bulb onions but bioavailable in fresh consumption), Vitamin K1: ~207µg (exceptionally high; one of the richest vegetable sources, highly bioavailable with dietary fat), Folate (B9): ~16µg, Vitamin B6 (pyridoxine): ~0.06mg, Vitamin A (as beta-carotene equivalents from green tops): ~50µg RAE. Minerals — Potassium: ~212mg, Calcium: ~72mg (moderate bioavailability due to moderate oxalate content), Phosphorus: ~37mg, Magnesium: ~20mg, Iron: ~1.2mg (non-heme; bioavailability enhanced by co-present Vitamin C), Manganese: ~0.16mg, Zinc: ~0.39mg. Bioactive compounds — Flavonoids: quercetin (~45–60mg/100g dry weight), kaempferol (~8–15mg/100g dry weight), isoquercitrin and quercitrin (glycosylated forms; glycosylation reduces immediate absorption rate but colonic microbiota hydrolysis improves systemic availability compared to aglycone forms); Organosulfur compounds: alliin, allicin precursors, dipropyl disulfide, and methyl propyl disulfide (concentrations lower than A. sativum but higher than common bulb onion); Fructooligosaccharides (FOS): ~2–3g/100g (prebiotic fiber, largely fermented in colon); Phenolic acids: caffeic acid and ferulic acid detected at low concentrations (~1–5mg/100g). Bioavailability notes: Green leaf portions contain significantly higher carotenoid and vitamin K content than white basal portions; flavonoid glycosides require intestinal or microbial hydrolysis for absorption; cooking reduces Vitamin C by 30–50% and alters organosulfur compound profiles through thermal degradation of alliinase enzyme activity.

Preparation & Dosage

No clinically studied dosage ranges or standardized extract concentrations are available in the research. The studies focus on phytochemical composition analysis rather than therapeutic dosing protocols. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Garlic, quercetin, green tea extract, turmeric, vitamin C

Safety & Interactions

Cebolleta is generally recognized as safe when consumed as a food ingredient, with no major adverse effects reported in traditional culinary use. Potential interactions with anticoagulant medications may occur due to flavonoid content, similar to other Allium species. Individuals with documented allergies to onions or garlic should exercise caution. Safety during pregnancy and lactation has not been established through clinical studies, though culinary consumption appears well-tolerated.