Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
Cyanidin-3-glucoside is an anthocyanin flavonoid that activates Nrf2 antioxidant pathways and modulates glucose metabolism. This bioactive compound demonstrates anti-inflammatory effects by reducing pro-inflammatory cytokine production.
Origin & History
Cyanidin-3-glucoside (C3G) is an anthocyanin compound naturally found in pigmented fruits and plants including black beans (Phaseolus vulgaris), berries, mulberries, and red grapes, where it serves as the pigment responsible for red, purple, and blue colors. Commercial extraction typically involves solvent-based methods from plant sources like black bean seed coats, followed by purification processes.
Research Narrative (Provisional)
Human clinical evidence is limited to one pharmacokinetic study using black bean seed coat extract over 2 weeks, confirming absorption with no serious adverse events. Systematic reviews note promising results from 16 diabetic rodent studies but emphasize the critical need for human randomized controlled trials, as no RCTs or meta-analyses on efficacy outcomes were identified.
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
Cyanidin-3-glucoside (C3G) is a pure polyphenolic compound (anthocyanin subclass), not a whole food, so traditional macronutrient/micronutrient profiling does not apply. Key compositional data: Molecular weight 449.2 g/mol; chemical formula C21H21O11+. Bioactive concentration in food sources varies significantly — blueberries contain approximately 0.1–0.5 mg/g fresh weight, black rice bran 0.5–3.0 mg/g dry weight, elderberries 0.4–1.0 mg/g fresh weight, and blackcurrants 0.3–0.8 mg/g fresh weight. As an isolated compound, it is 100% bioactive anthocyanin with no fat, protein, or fiber content. Bioavailability is notably low and variable: oral bioavailability estimates range from 0.1–1.8% in human studies, with peak plasma concentrations (Cmax) typically reaching 1–50 nmol/L after dietary intake. Absorption occurs primarily in the stomach and small intestine via bilitranslocase and glucose transporters (SGLT1, GLUT2). Extensive first-pass metabolism converts C3G to protocatechuic acid and phloroglucinol aldehyde, which are the primary circulating metabolites contributing to systemic effects. Co-ingestion with dietary fat or vitamin C has been shown to modestly improve absorption by approximately 15–20%. Stability is pH-dependent — degradation accelerates above pH 6, limiting small intestinal absorption. Half-life in plasma is approximately 1.5–2 hours post-ingestion.
Reported Mechanism (Provisional)
Cyanidin-3-glucoside activates the Nrf2 transcription factor pathway, enhancing cellular antioxidant enzyme production and reducing oxidative DNA damage. The compound modulates glucose metabolism through insulin signaling pathway enhancement and reduces inflammatory responses by inhibiting NF-κB-mediated cytokine release. These molecular mechanisms contribute to its protective effects against metabolic dysfunction and oxidative stress.
Clinical Narrative (Provisional)
Animal studies demonstrate that cyanidin-3-glucoside achieved glucose reduction in 87.5% of diabetic rodent models, indicating strong preclinical efficacy for metabolic regulation. Preclinical research shows activation of Nrf2 antioxidant pathways and reduction of pro-inflammatory markers in laboratory settings. However, comprehensive human clinical trials are currently lacking, limiting the translation of these promising animal results to human applications. The existing evidence base requires expansion with randomized controlled trials in human populations.
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