ProLivenol (Lonicera japonica extract)

ProLivenol is a standardized Lonicera japonica (Japanese honeysuckle) extract containing chlorogenic acid (1.75%) and luteolin as primary bioactives, which exert hepatoprotective effects through antioxidant radical scavenging and nitric oxide pathway inhibition. Current evidence is limited to in vitro and preliminary cell-based studies, with no large-scale human clinical trials yet published.

Origin & History

ProLivenol is a branded extract derived from Lonicera japonica (Japanese honeysuckle), a flowering plant native to Eastern Asia, particularly China, Japan, and Korea. The extract is produced from flower buds using ethanol extraction (50-95%), water extraction, or supercritical fluid extraction, followed by filtration, concentration, and freeze-drying.

Historical & Cultural Context

Lonicera japonica flower (Jin Yin Hua) has been used in Traditional Chinese Medicine for over 1,000 years to treat heat-related conditions, infections, fevers, and respiratory issues. It is valued in classical texts for clearing heat, detoxifying, and anti-inflammatory effects.

Health Benefits

• Antioxidant activity: In vitro studies show DPPH radical scavenging (IC50 56.8 μg/ml) and SOD scavenging (IC50 134.1 μg/ml) for 75% ethanol extracts (preliminary evidence)
• Anti-inflammatory effects: Cell studies demonstrate nitric oxide inhibition attributed to chlorogenic acid (1.75%) and luteolin-7-O-glucoside (0.035%) content (preliminary evidence)
• Traditional fever reduction: Used in Traditional Chinese Medicine for over 1,000 years to treat heat-related conditions and fevers (traditional evidence only)
• Respiratory support: Historically used for respiratory issues including severe acute respiratory syndromes and H1N1 influenza (traditional evidence only)
• Detoxification support: Traditional use for clearing heat and detoxifying, though no clinical evidence exists (traditional evidence only)

How It Works

ProLivenol's chlorogenic acid and luteolin inhibit inducible nitric oxide synthase (iNOS), reducing pro-inflammatory nitric oxide production in macrophage cell models. The extract's polyphenols neutralize free radicals through hydrogen atom transfer and electron donation mechanisms, demonstrated by DPPH radical scavenging (IC50 56.8 μg/ml) and superoxide dismutase-comparable scavenging (IC50 134.1 μg/ml) in 75% ethanol extract preparations. Chlorogenic acid also modulates NF-κB signaling pathways, potentially reducing downstream cytokine cascades relevant to hepatic inflammation.

Scientific Research

No human clinical trials, RCTs, or meta-analyses specifically on ProLivenol or standardized Lonicera japonica extracts were identified. Available evidence is limited to in vitro and animal studies demonstrating antioxidant and anti-inflammatory activities, with no PubMed PMIDs for human studies found.

Clinical Summary

Available evidence for ProLivenol is currently restricted to in vitro assays and cell-based studies; no peer-reviewed randomized controlled trials in human subjects have been published as of the current data. DPPH and SOD radical scavenging activity was quantified in laboratory assays using 75% ethanol extracts, establishing preliminary antioxidant benchmarks. Nitric oxide inhibition attributed specifically to chlorogenic acid (1.75% standardization) was demonstrated in cell culture models, providing a mechanistic rationale but not proof of clinical efficacy. Until controlled human trials with defined dosages and liver-specific biomarkers (ALT, AST, GGT) are completed, efficacy claims must be considered preliminary and extrapolated from phytochemical research.

Nutritional Profile

ProLivenol is a standardized Lonicera japonica (Japanese honeysuckle) extract, not a conventional food, so macronutrient content (protein, fat, carbohydrate) is negligible at typical supplement doses. Key bioactive compounds include: • Chlorogenic acid: ~1.75% (primary phenolic acid; contributes to antioxidant and anti-inflammatory activity; bioavailability is moderate, undergoing hydrolysis to caffeic acid and quinic acid by gut esterases and microbial metabolism, with peak plasma levels at ~1–2 hours post-ingestion) • Luteolin-7-O-glucoside: ~0.035% (flavonoid glycoside; hydrolyzed to luteolin aglycone in the gut, which has moderate absorption; undergoes extensive phase II conjugation reducing free-form bioavailability to ~5–10%) • Luteolin (aglycone): trace amounts present; low aqueous solubility limits oral bioavailability without glycoside or lipid-based delivery • Caffeic acid: present as a secondary metabolite and chlorogenic acid degradation product • Loganin and secologanin: iridoid glycosides characteristic of Lonicera japonica, typically present at 0.5–2% in whole extracts; contribute to anti-inflammatory signaling; bioavailability is moderate via intestinal absorption • Saponins: minor amounts present, may enhance membrane permeability of co-administered compounds • Cynaroside and other minor flavonoids: trace levels • Polyphenol content (total): estimated at 3–8% by gallic acid equivalents depending on extraction solvent (75% ethanol extracts yield higher polyphenol concentration) • Essential minerals and vitamins: not a significant source; negligible amounts of potassium, calcium, and magnesium may be present from plant matrix • Fiber: not applicable at extract doses • Extraction solvent note: 75% ethanol extraction preferentially concentrates mid-polarity phenolics (chlorogenic acid, flavonoid glycosides) over water-soluble sugars or highly lipophilic terpenes • Bioavailability considerations: overall polyphenol bioavailability is limited by first-pass hepatic metabolism and glucuronidation/sulfation; co-administration with piperine or lipid carriers may enhance absorption; colonic microbiota further metabolize unabsorbed polyphenols into smaller phenolic acids (e.g., 3-hydroxyphenylpropionic acid) which may contribute to systemic effects

Preparation & Dosage

No clinically studied dosage ranges for ProLivenol in humans have been established. In vitro studies used extract concentrations equivalent to 0.89-1.75% chlorogenic acid or 0.017-0.035% luteolin-7-O-glucoside, but no standardization for human therapeutic use is available. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Milk thistle, N-acetyl cysteine, Alpha-lipoic acid, Vitamin C, Green tea extract

Safety & Interactions

Lonicera japonica extracts are generally regarded as well-tolerated in traditional use, but standardized ProLivenol extract lacks long-term human safety data from clinical trials. Individuals taking anticoagulants such as warfarin should exercise caution, as chlorogenic acid may influence platelet aggregation and CYP450 enzyme activity, potentially altering drug metabolism. Pregnancy and breastfeeding safety has not been established for this specific extract, and use is not recommended without medical supervision in these populations. Those with known allergies to plants in the Caprifoliaceae family should avoid this ingredient, and individuals on immunosuppressive or hepatotoxic medications should consult a physician before use.