Chrysin

Chrysin is a naturally occurring flavonoid found in passionflower, honey, and propolis that modulates enzyme activity and cellular signaling pathways. It demonstrates potential benefits for digestive health during chemotherapy and shows antiproliferative effects against cancer cells in laboratory studies.

Origin & History

Chrysin is a naturally occurring flavonoid (5,7-dihydroxyflavone) found in honey, propolis, passionflower (Passiflora caerulea), and various fruits and vegetables. It is commonly extracted from honeycomb and plant sources using traditional solvent methods and isolated as a pure compound for dietary supplements.

Historical & Cultural Context

No specific historical or traditional medicine use information was provided in the clinical research sources. The compound has been recognized as a constituent of honey and propolis, traditional food sources.

Health Benefits

• May support digestive health during chemotherapy by reducing irinotecan-induced diarrhea through UGT1A1 enzyme upregulation (preliminary human evidence, PMID: 16003560)
• Shows antiproliferative effects against prostate cancer cells in laboratory studies (IC50 24.5 µM at 48h, preclinical evidence only)
• Demonstrates antioxidant and anti-inflammatory properties in preclinical models (mechanistic studies, human evidence lacking)
• May modestly reduce fasting glucose levels when taken as micellar formulation (minor effect observed in 15-person trial)
• Potentially enhances chemotherapy tolerability through reduction of treatment-related toxicity (pilot study evidence only)

How It Works

Chrysin upregulates UGT1A1 enzyme activity, which enhances the detoxification of certain chemotherapy drugs like irinotecan and reduces associated gastrointestinal side effects. The flavonoid also modulates cellular signaling pathways involved in cancer cell proliferation, demonstrating cytotoxic effects through apoptosis induction and cell cycle arrest mechanisms.

Scientific Research

Clinical evidence for chrysin is limited to small pilot studies. A 20-patient open-label safety trial (PMID: 16003560) showed no chrysin-attributable toxicities when combined with irinotecan chemotherapy. A 15-person randomized crossover pharmacokinetic trial demonstrated that micellar chrysin formulation achieved >2-fold higher bioavailability than unformulated chrysin with good tolerability over 30 days.

Clinical Summary

Human evidence for chrysin remains limited, with preliminary studies showing potential benefits for reducing irinotecan-induced diarrhea through UGT1A1 enzyme modulation. Laboratory studies demonstrate antiproliferative effects against prostate cancer cells with an IC50 of 24.5 µM at 48 hours. Most research consists of preclinical studies and small-scale investigations. Larger, well-controlled human trials are needed to establish definitive therapeutic benefits and optimal dosing protocols.

Nutritional Profile

Chrysin (5,7-dihydroxyflavone) is a naturally occurring flavonoid compound, not a macronutrient or conventional food ingredient. Molecular weight: 254.24 g/mol. Chemical formula: C15H10O4. It contains no protein, fat, carbohydrate, fiber, or caloric value in its isolated form. Found naturally in honey (up to ~0.1–1 mg/kg depending on floral source), propolis (concentrations ranging approximately 0.5–2% of dry weight in some samples), passionflower (Passiflora caerulea) aerial parts, and certain mushrooms. As a bioactive compound, it belongs to the flavone subclass of polyphenols, sharing a backbone with apigenin and luteolin. Key bioactive characteristic: two hydroxyl groups at positions 5 and 7 on the A-ring, with an unsubstituted B-ring, distinguishing it from many other flavonoids. Bioavailability is notably poor when taken orally in isolated form — estimated oral bioavailability in humans is below 1–3% due to rapid phase II metabolism (glucuronidation and sulfation), limited aqueous solubility (~0.02 mg/mL in water), and extensive first-pass metabolism. Piperine co-administration has been studied to enhance absorption. Plasma half-life reported at approximately 1.5–3 hours in limited human pharmacokinetic data. No vitamins, essential minerals, or dietary fiber are inherent to the compound itself.

Preparation & Dosage

Human studies used oral chrysin twice daily (exact dose not specified in cancer trial) or single doses of micellar formulations followed by 30 days of daily use. No standardized dosing recommendations exist due to limited clinical data. Micellar formulations show superior bioavailability. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Quercetin, Rutin, Propolis, Passionflower extract, Green tea catechins

Safety & Interactions

Chrysin appears generally well-tolerated in healthy individuals, though comprehensive safety data is limited. The compound may interact with medications metabolized by UGT enzymes, potentially altering drug clearance rates. Individuals undergoing chemotherapy should consult healthcare providers before supplementation due to potential drug interactions. Safety during pregnancy and breastfeeding has not been established through clinical studies.