# Protykin (Polygonum cuspidatum extract)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/protykin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-30
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Polygonum cuspidatum extract, Japanese knotweed extract, Hu Zhang, Fallopia japonica extract, Reynoutria japonica extract, Asian knotweed extract, Tiger cane extract, Bushy knotweed extract

## Overview

Protykin is a standardized extract of Polygonum cuspidatum (Japanese knotweed) delivering concentrated trans-resveratrol, the primary bioactive stilbene responsible for its effects. It exerts anti-aging and [antioxidant activity](/ingredients/condition/antioxidant) mainly by activating SIRT1 deacetylase and the Nrf2/ARE pathway, modulating gene expression linked to [inflammation](/ingredients/condition/inflammation), oxidative stress, and [cellular senescence](/ingredients/condition/longevity).

## Health Benefits

• [Anti-inflammatory](/ingredients/condition/inflammation) effects: Animal studies show suppression of TLR2/NF-κB pathways and reduction in arthritis scores (preliminary evidence only)
• [Antioxidant activity](/ingredients/condition/antioxidant): Preclinical data demonstrates ROS reduction and Nrf2 activation in oxidative stress models (animal studies only)
• [Hepatoprotective](/ingredients/condition/detox) potential: Fructose-fed rat studies (80-160 mg/kg) showed liver protection via Keap1/Nrf2 pathways (no human data)
• Joint health support: Animal models using 65 mg/kg/day showed benefits for gouty arthritis (preclinical evidence)
• Skin-soothing properties: Cosmetic applications suggest irritation reduction benefits (traditional use basis)

## Mechanism of Action

Trans-resveratrol in Protykin activates SIRT1, a NAD+-dependent deacetylase that regulates PGC-1α, p53, and NF-κB, collectively suppressing [pro-inflammatory cytokine](/ingredients/condition/inflammation) transcription and promoting [mitochondrial biogenesis](/ingredients/condition/energy). It simultaneously activates the Nrf2/ARE transcription axis, upregulating endogenous antioxidant enzymes including superoxide dismutase (SOD), catalase, and heme oxygenase-1 (HO-1) to neutralize [reactive oxygen species](/ingredients/condition/antioxidant). Additionally, resveratrol inhibits TLR2-mediated NF-κB signaling and COX-2 enzyme activity, reducing prostaglandin E2 synthesis and downstream inflammatory cascades.

## Clinical Summary

Most evidence for Protykin derives from in vitro cell studies and rodent models; robust human clinical trials specifically using this branded extract are limited. Animal studies demonstrate reductions in arthritis severity scores and hepatic [oxidative stress](/ingredients/condition/antioxidant) markers following oral resveratrol administration at doses of 20–100 mg/kg. A small number of human pharmacokinetic trials confirm that trans-resveratrol from Polygonum cuspidatum is bioavailable, though oral bioavailability remains low (~1%) due to rapid glucuronidation and sulfation. The overall evidence base is preliminary; Protykin's health claims should be considered promising but not yet established by large-scale randomized controlled trials.

## Nutritional Profile

Protykin is a standardized extract of Polygonum cuspidatum (Japanese knotweed) root, not consumed as a whole food, so macronutrient values (protein, fat, carbohydrate, fiber) are negligible at typical supplement doses. Key bioactive compounds: • Trans-resveratrol: Protykin is standardized to contain approximately 20% trans-resveratrol (roughly 200 mg per gram of extract), which is the primary active stilbenoid and the main reason for commercial interest; bioavailability of oral trans-resveratrol is low (~1–5% reaches systemic circulation unchanged) due to rapid Phase II [metabolism](/ingredients/condition/weight-management) (glucuronidation and sulfation in intestinal epithelium and liver), though metabolites (resveratrol-3-O-sulfate, resveratrol-3-O-glucuronide) may retain partial biological activity. • Emodin: Present at approximately 1–5% of extract weight; an anthraquinone with laxative, [anti-inflammatory](/ingredients/condition/inflammation), and [hepatoprotective](/ingredients/condition/detox) properties; oral bioavailability is low (~7–10%) due to extensive glucuronidation. • Polydatin (piceid/resveratrol-3-O-β-D-glucoside): Typically 5–15% of extract; a glycosylated form of resveratrol with modestly higher water solubility and potentially improved intestinal absorption compared to free resveratrol, as it may be absorbed via SGLT1 glucose transporters before hydrolysis to free resveratrol by gut microbiota. • Proanthocyanidins/catechins: Minor amounts (~1–3%), contributing to overall [antioxidant](/ingredients/condition/antioxidant) capacity (ORAC values reported in the range of 3,000–5,000 µmol TE/g extract). • Chrysophanol and physcion: Trace anthraquinone derivatives (<1%), contributing mild additional anti-inflammatory effects. • Minerals: Trace amounts of calcium, potassium, iron, and zinc derived from the root matrix, but quantities are nutritionally insignificant at supplemental doses (typically 100–500 mg extract/day). • No significant vitamin content. • No meaningful caloric contribution. Bioavailability notes: Co-administration with piperine (BioPerine) or lipid-based delivery systems has been reported in preclinical models to enhance resveratrol bioavailability by 2–5-fold via inhibition of glucuronidation. The presence of polydatin in the whole extract may provide a sustained-release reservoir of resveratrol through gradual microbial hydrolysis in the colon.

## Dosage & Preparation

No clinically studied human dosages are available. Animal studies used polydatin at 7.5-50 mg/kg and extract at 65-4000 mg/kg daily, with commercial extracts standardized to 10-98% resveratrol content. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Protykin is generally well tolerated at typical supplemental doses of 200–500 mg/day of standardized trans-resveratrol, with gastrointestinal discomfort (nausea, diarrhea) reported at higher doses exceeding 1,000 mg/day. Trans-resveratrol inhibits CYP3A4, CYP2C9, and CYP2D6 enzymes, creating a clinically relevant risk of elevated plasma concentrations of anticoagulants (warfarin), statins, and immunosuppressants such as cyclosporine. It may also potentiate the effects of antiplatelet drugs and NSAIDs, increasing bleeding risk, and should be discontinued at least two weeks before surgery. Safety in pregnancy and lactation has not been established in humans, and use is not recommended in these populations.

## Scientific Research

Available evidence for Protykin is limited to preclinical studies, with no human clinical trials, RCTs, or meta-analyses identified. One review (PMC9833411) summarizes animal and in vitro [anti-inflammatory](/ingredients/condition/inflammation) effects, including polydatin administration (45 mg/kg) in mouse models and extract supplementation (4 g/kg/day for 12 weeks) in rat arthritis models.

## Historical & Cultural Context

In Traditional Chinese Medicine (TCM), Polygonum cuspidatum is known as Hu Zhang and has been used for centuries to treat dizziness, headaches, traumatic injuries, and burns. The rhizomes are traditionally valued for their [anti-inflammatory](/ingredients/condition/inflammation) and detoxification properties.

## Synergistic Combinations

Quercetin, Curcumin, Green Tea Extract, Boswellia, [NAD+ precursor](/ingredients/condition/longevity)s

## Frequently Asked Questions

### What is the difference between Protykin and regular resveratrol supplements?

Protykin is a patented, standardized extract of Polygonum cuspidatum guaranteed to contain a specific percentage of trans-resveratrol — typically 20% or 50% — ensuring consistent potency per dose. Generic resveratrol supplements vary widely in trans- versus cis-resveratrol ratios and may contain less bioactive isomer content, whereas Protykin's standardization provides more predictable pharmacological activity aligned with research-grade material.

### How much Protykin should I take per day?

Common supplemental doses range from 200 mg to 500 mg per day of Protykin extract standardized to 20–50% trans-resveratrol, delivering roughly 40–250 mg of active trans-resveratrol daily. Most human pharmacokinetic studies used 250–500 mg of trans-resveratrol; doses above 1,000 mg/day are associated with gastrointestinal side effects without proven additional benefit. Always follow the manufacturer's label and consult a healthcare provider, especially if taking medications metabolized by CYP enzymes.

### Can Protykin interact with blood thinners like warfarin?

Yes — trans-resveratrol in Protykin inhibits CYP2C9, the primary enzyme responsible for warfarin metabolism, which can elevate warfarin plasma levels and significantly increase bleeding risk. It also possesses mild antiplatelet activity by inhibiting thromboxane B2 synthesis, compounding the interaction. Patients on anticoagulant or antiplatelet therapy should consult their physician before using Protykin and may require INR monitoring if combined use is approved.

### Does Protykin activate SIRT1 like caloric restriction?

Trans-resveratrol directly binds and allosterically activates SIRT1 deacetylase, the same longevity-associated enzyme upregulated during caloric restriction, at concentrations achievable through supplementation. SIRT1 activation deacetylates PGC-1α to stimulate mitochondrial biogenesis and deacetylates NF-κB's p65 subunit to suppress inflammatory gene expression. While the caloric restriction mimetic effect is well-characterized in cell and animal models, whether Protykin replicates human longevity outcomes of true caloric restriction remains unproven.

### Is Protykin safe to take long-term?

Long-term human safety data specifically for Protykin is limited; studies up to 3 months using trans-resveratrol doses of 250–500 mg/day have not reported serious adverse events in healthy adults. However, chronic use at high doses (≥1,000 mg/day) has been associated with gastrointestinal disturbance and, theoretically, hormonal effects due to resveratrol's mild estrogenic activity via ERα and ERβ receptor binding. Individuals with hormone-sensitive conditions, liver disease, or those on polypharmacy should seek medical guidance before long-term supplementation.

### What does the research evidence show about Protykin's anti-inflammatory effects?

Current evidence for Protykin's anti-inflammatory benefits comes primarily from animal studies, which demonstrate suppression of TLR2/NF-κB signaling pathways and reduced arthritis scores in rodent models. However, human clinical trials are limited, meaning these anti-inflammatory effects have not yet been confirmed in people. More research is needed before making strong claims about its effectiveness for human inflammatory conditions.

### Who should avoid Protykin supplementation?

Individuals taking anticoagulant or antiplatelet medications should consult a healthcare provider before using Protykin, as it may have mild blood-thinning properties. Pregnant and nursing women should avoid Protykin due to insufficient safety data in these populations. Those with liver disease or taking hepatotoxic medications should also seek medical guidance, as Protykin's hepatoprotective claims remain largely based on animal research rather than human studies.

### How does Protykin's bioavailability compare to whole Polygonum cuspidatum plant material?

Protykin is a standardized extract of Polygonum cuspidatum, which typically concentrates resveratrol and other polyphenols to deliver higher levels of active compounds than whole plant material. This extraction process is designed to improve bioavailability and consistency compared to raw herb powders, though the exact absorption rates in humans have not been extensively characterized. The standardized approach ensures more predictable dosing and potency across batches.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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