Hemerocallis fulva (Daylily Buds)

Hemerocallis fulva (daylily buds) contains bioactive compounds including flavonoids and phenolic acids that may protect cardiac and liver cells from ethanol-induced oxidative damage. Preliminary cell studies suggest it reduces cellular enzyme leakage and supports membrane integrity through antioxidant mechanisms.

Origin & History

Hemerocallis fulva, commonly known as daylily, is a perennial plant native to East Asia. The ingredient is derived from its edible flower buds or flowers, which are harvested fresh. For research purposes, they are processed into aqueous, ethanol, or steamed extracts via solvent-based preparation.

Historical & Cultural Context

In Traditional Chinese Medicine, Hemerocallis fulva flowers and roots have been used for centuries as an anti-inflammatory, sedative, and treatment for depression and parasitic infections. This historical use for mood is supported by preclinical research showing antidepressant-like effects of its ethanol extracts in animal models.

Health Benefits

["\u2022 May support cardiac cell health against ethanol-induced stress by increasing viability and reducing enzyme leakage, based on preliminary in vitro cell studies (PMID: 38526821).", "\u2022 May protect liver cells from ethanol-induced damage by reducing ALT/AST leakage, according to preliminary in vitro evidence (PMID: 38526821).", "\u2022 Exhibits anti-apoptotic properties by modulating Bcl-2 and Bax mRNA expression in various cell types, as shown in preclinical in vitro research (PMID: 38526821, 29693723).", "\u2022 May protect vascular endothelial cells from high-glucose damage by reducing oxidative stress and inflammatory markers, based on a preliminary in vitro study (PMID: 29693723).", "\u2022 Demonstrates antioxidant effects by increasing glutathione levels and reducing reactive oxygen species (ROS) in human endothelial cells, according to preliminary in vitro evidence (PMID: 29693723)."]

How It Works

Daylily buds contain flavonoids and phenolic compounds that appear to stabilize cellular membranes and reduce oxidative stress markers. The bioactive compounds may inhibit lipid peroxidation and preserve cellular integrity by reducing ALT and AST enzyme leakage from hepatocytes and cardiomyocytes exposed to ethanol.

Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses have been conducted on Hemerocallis fulva. All available scientific evidence is limited to preclinical in vitro cell studies investigating its cytoprotective effects (PMID: 38526821, 29693723).

Clinical Summary

Current research is limited to preliminary in vitro cell culture studies examining ethanol-induced cellular damage. One study (PMID: 38526821) demonstrated increased cardiac cell viability and reduced enzyme leakage in ethanol-stressed cardiomyocytes. Similar protective effects were observed in liver cells with reduced ALT/AST leakage, though specific sample sizes and quantified outcomes require further investigation. No human clinical trials have been conducted to date.

Nutritional Profile

Hemerocallis fulva (Daylily Buds) are a nutrient-dense edible flower bud with the following approximate composition per 100g fresh weight: Protein: 2.6–3.1g (containing essential amino acids including lysine, arginine, and glutamic acid); Total carbohydrates: 6.8–8.5g; Dietary fiber: 1.8–2.3g; Fat: 0.4–0.6g (predominantly unsaturated fatty acids including linoleic acid and palmitic acid); Moisture content: approximately 88–90%. Micronutrients include: Vitamin C: 26–43mg/100g (moderate bioavailability, though heat-sensitive); Beta-carotene (provitamin A): 1.0–1.8mg/100g (fat-soluble, bioavailability enhanced with dietary fat); Vitamin E (alpha-tocopherol): trace to 0.3mg/100g; Iron: 1.4–2.1mg/100g (non-heme form, bioavailability 5–12%, enhanced by co-ingested vitamin C); Potassium: 130–180mg/100g; Calcium: 73–90mg/100g; Phosphorus: 44–60mg/100g; Magnesium: 14–20mg/100g; Zinc: 0.3–0.5mg/100g. Bioactive compounds include: Total flavonoids: 15–35mg quercetin equivalents/g dry weight (including quercetin, kaempferol, and rutin glycosides); Total polyphenols: 20–55mg gallic acid equivalents/g dry weight; Colchicine alkaloid: present at low concentrations (approximately 0.1–0.2mg/g in buds — toxicologically relevant; raw consumption in large amounts may cause gastrointestinal toxicity; cooking significantly degrades colchicine content); Steroidal saponins: detected qualitatively; Hemerocallin and other anthraquinone derivatives: trace levels identified chromatographically. Carotenoids (total): 1.5–3.0mg/100g including lutein and zeaxanthin relevant to ocular health. Bioavailability notes: Polyphenols undergo phase II metabolism with moderate systemic bioavailability; colchicine reduction via boiling (>10 minutes) is strongly advised before consumption; iron absorption is inhibited by co-present tannins and oxalates.

Preparation & Dosage

No clinically studied dosages for Hemerocallis fulva exist due to the lack of human trials. Preclinical in vitro studies used 0.25-2% concentrations of various extracts in cell culture media, but these do not translate to human oral doses. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

N-Acetylcysteine, Curcumin, Rutin, Quercetin

Safety & Interactions

Daylily buds are generally consumed as food in various cultures, but comprehensive safety data is lacking. Potential allergic reactions may occur in sensitive individuals, particularly those with lily family allergies. No known drug interactions have been documented, though this may be due to limited research rather than confirmed safety. Pregnant and breastfeeding women should exercise caution due to insufficient safety data.