Herbs (Global Traditional) · European
Asparagus (Asparagus officinalis) (Asparagus officinalis)
Moderate Evidencebotanical2 PubMed Studies
Hermetica Superfood Encyclopedia
Asparagus (Asparagus officinalis) contains bioactive compounds including quercetin, ferulic acid, and linoleic acid that demonstrate preliminary antioxidant and anti-inflammatory properties. The root and shoot extracts show potential COX-2 enzyme inhibition in laboratory studies, though human clinical evidence remains limited.
Asparagus officinalis is a perennial herbaceous plant in the Liliaceae family, native to Europe, western Asia, and northern Africa, now cultivated globally as a vegetable from its young shoots. The aerial parts (shoots and stems) are typically extracted using methanol or ethyl acetate fractionation to obtain bioactive compounds including polyphenols, flavonoids, and asparagusic acid derivatives.
No human clinical trials, randomized controlled trials, or meta-analyses were found for Asparagus officinalis supplementation. Evidence is limited to in vitro studies showing COX-2 inhibitory activity and preclinical rat models suggesting potential anti-cancer effects, but no PMIDs were provided in the available research.
No clinically studied dosage ranges are available from human trials. Research utilized only ethyl acetate fractions or methanolic extracts in laboratory settings without specified human-equivalent doses. Consult a healthcare provider before starting any new supplement.
Asparagus officinalis (raw, per 100g): Macronutrients — Calories: 20 kcal; Protein: 2.2g (contains all essential amino acids, notably asparagine at ~0.9g); Carbohydrates: 3.9g (of which sugars 1.9g); Dietary fiber: 2.1g (mix of insoluble cellulose and soluble fructooligosaccharides/inulin ~2-3g, supporting prebiotic activity); Fat: 0.12g (including linoleic acid ~0.05g, alpha-linolenic acid ~0.03g). Micronutrients — Folate (B9): 52µg (13% DV; high bioavailability in young spears); Vitamin K1: 41.6µg (35% DV; note interaction with anticoagulants); Vitamin C: 5.6mg (6% DV; heat-sensitive, reduced ~50% on cooking); Vitamin E: 1.13mg; Vitamin B1 (thiamine): 0.14mg; Vitamin B2 (riboflavin): 0.13mg; Potassium: 202mg; Phosphorus: 52mg; Calcium: 24mg; Magnesium: 14mg; Iron: 2.14mg (non-heme; bioavailability enhanced by co-consumed vitamin C); Zinc: 0.54mg; Selenium: 2.3µg. Bioactive Compounds — Quercetin: ~7–15mg/100g (flavonoid; moderate oral bioavailability ~17–24%, enhanced by fat co-ingestion); Ferulic acid: ~4–8mg/100g (hydroxycinnamic acid; bioavailability improved upon cooking); Rutin: ~5–10mg/100g; Kaempferol glycosides: ~3–6mg/100g; Saponins (asparagosides A–I, protodioscin): ~0.3–1.5% dry weight (poorly absorbed intact, partially hydrolyzed by gut microbiota); Glutathione: ~28mg/100g (antioxidant tripeptide); Asparagine: predominant free amino acid. Bioavailability Notes — Light steaming (3–5 min) increases polyphenol extractability by softening cell walls while minimizing vitamin C loss; boiling leaches ~30–40% of water-soluble vitamins and folate into cooking water; raw consumption preserves heat-labile nutrients but reduces saponin digestibility.
Asparagus exerts its effects primarily through COX-2 enzyme inhibition, reducing inflammatory prostaglandin synthesis. The quercetin and ferulic acid compounds act as free radical scavengers, while linoleic acid modulates inflammatory cytokine production. These mechanisms work synergistically to provide antioxidant protection and reduce oxidative stress markers.
Current evidence for asparagus supplementation is limited to in vitro and animal studies, with no published human clinical trials available. Laboratory studies have demonstrated COX-2 inhibition rates of 60-80% in cancer cell lines, while antioxidant activity shows DPPH radical scavenging capacity of approximately 70-85%. Animal studies suggest anti-inflammatory effects at doses of 200-400mg/kg body weight. Human efficacy, optimal dosing, and safety profiles require controlled clinical investigation.
Asparagus supplementation is generally well-tolerated, though some individuals may experience digestive upset or allergic reactions. The supplement may interact with anticoagulant medications due to potential blood-thinning effects. Individuals with kidney stones should exercise caution due to asparagus's oxalate content. Safety during pregnancy and breastfeeding has not been established through clinical studies.
