Hesperetin-7-O-rutinoside

Hesperetin-7-O-rutinoside is a flavanone glycoside found predominantly in citrus fruits, structurally characterized by a hesperetin aglycone bound to a rutinose disaccharide at the 7-position. Its primary proposed mechanism involves free radical scavenging via its phenolic hydroxyl groups and modulation of oxidative stress pathways, though human clinical evidence remains absent.

Origin & History

Hesperetin-7-O-rutinoside, also known as hesperidin, is a flavanone glycoside found predominantly in the peels of citrus fruits such as grapefruits, lemons, and sweet oranges. It is commercially available as a purified compound with a purity of ≥90%.

Historical & Cultural Context

No historical or traditional use information for hesperetin-7-O-rutinoside is provided in the available research. Its use remains largely unexplored in traditional medicine systems.

Health Benefits

• No specific health benefits have been documented in human clinical trials or meta-analyses for hesperetin-7-O-rutinoside. • Due to the lack of specific studies, the health benefits remain speculative and based on general properties of flavonoids. • Potential antioxidant benefits could be inferred from its classification as a flavonoid, yet no direct evidence is available. • The compound may support vascular health due to its source, but evidence is anecdotal. • Possible anti-inflammatory effects are suggested by its classification, though not specifically studied.

How It Works

Hesperetin-7-O-rutinoside is theorized to exert antioxidant activity through donation of hydrogen atoms from its phenolic hydroxyl groups to neutralize reactive oxygen species, including superoxide anion and hydroxyl radicals. Following intestinal hydrolysis of the rutinose sugar moiety by gut microbial enzymes such as alpha-rhamnosidase and beta-glucosidase, the liberated hesperetin aglycone may inhibit pro-inflammatory enzymes including cyclooxygenase-2 (COX-2) and lipoxygenase (LOX). Additionally, hesperetin has been shown in cell-based studies to activate the Nrf2-Keap1 pathway, upregulating endogenous antioxidant enzymes such as heme oxygenase-1 (HO-1) and superoxide dismutase (SOD).

Scientific Research

No key human clinical trials, RCTs, or meta-analyses specific to hesperetin-7-O-rutinoside are identified. Thus, no PMIDs or study data are available to reference.

Clinical Summary

No human clinical trials, randomized controlled studies, or meta-analyses have been conducted specifically on hesperetin-7-O-rutinoside as an isolated compound. Available evidence is limited to in vitro cell culture experiments and animal model studies, which are insufficient to establish efficacy or effective dosage in humans. Some extrapolation from hesperidin research — a structurally similar flavanone glycoside with a neohesperidose rather than rutinose sugar — suggests possible cardiovascular and antioxidant effects, but direct translation to hesperetin-7-O-rutinoside is scientifically unvalidated. The overall evidence base must be characterized as preclinical and speculative at this stage.

Nutritional Profile

Hesperetin-7-O-rutinoside (also known as hesperidin) is a flavanone glycoside (molecular formula C₂₈H₃₄O₁₅, molecular weight ~610.56 g/mol) consisting of the aglycone hesperetin bound to the disaccharide rutinose (rhamnose + glucose) at the 7-position. It is not a macronutrient source (negligible calories, protein, fat, or carbohydrate contribution at typical dietary intakes). Key bioactive characteristics: • Classification: Flavanone glycoside (subclass of flavonoids). • Natural occurrence: Found predominantly in citrus fruit peels and membranes — sweet orange (Citrus sinensis) peel contains approximately 20–60 mg/g dry weight; lemon peel ~15–40 mg/g dry weight; whole orange juice provides roughly 200–700 mg/L depending on variety and processing. • Bioavailability: Oral bioavailability of intact hesperidin is low (~3–5% absorption in the small intestine). The rutinoside linkage (α-1,6-interglycosidic bond) resists hydrolysis by small intestinal β-glucosidases, so the majority reaches the colon intact where gut microbiota (e.g., Bifidobacterium, Lactobacillus) cleave the sugar moiety to release the aglycone hesperetin. Hesperetin is then absorbed colonically and undergoes extensive phase II metabolism (glucuronidation and sulfation) in enterocytes and the liver. Peak plasma concentrations of hesperetin metabolites typically appear 4–7 hours post-ingestion, reflecting colonic absorption. Plasma Cmax of total hesperetin conjugates after ~500 mg oral hesperidin is approximately 1–5 µmol/L. • Key bioactive compounds present alongside hesperidin in citrus matrices: other polymethoxylated flavones (nobiletin ~0.5–3 mg/g peel, tangeretin ~0.3–2 mg/g peel), naringin (~1–10 mg/g in grapefruit), vitamin C (ascorbic acid, ~50 mg per 100 mL orange juice), dietary fiber (pectin, ~1.5–3 g per whole orange), potassium (~180 mg per 100 g orange), and folate (~30 µg per 100 g orange). • Micronutrient contribution of isolated hesperidin itself: none — it does not supply vitamins or minerals. • Solubility note: Poorly water-soluble (~<0.01 mg/mL at 25 °C, neutral pH), which limits dissolution and absorption. Micronized or complexed forms (e.g., hesperidin-2S or glucosyl-hesperidin) can increase solubility 5–10-fold and improve Cmax by 2–4-fold. • No significant lipid, protein, or mineral content when consumed as a purified compound or supplement (typical supplement doses range from 250–1000 mg/day).

Preparation & Dosage

No clinically studied dosage ranges or forms are available for hesperetin-7-O-rutinoside. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Vitamin C, Quercetin, Rutin, Naringenin, Resveratrol

Safety & Interactions

No formal safety profile, tolerable upper intake level, or toxicology dataset exists specifically for isolated hesperetin-7-O-rutinoside in humans. Based on its structural similarity to hesperidin and general citrus flavonoid data, it is presumed to be well-tolerated at dietary exposure levels found in citrus consumption. Theoretically, high-dose flavonoid supplementation may interact with cytochrome P450 enzymes (particularly CYP3A4 and CYP2C9), potentially altering metabolism of drugs such as warfarin, statins, or calcium channel blockers. Pregnant and breastfeeding individuals should avoid supplemental doses due to the complete absence of safety data in these populations.