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Japanese Knotweed

Reynoutria japonica

Use with Caution evidence: limited

Scientific Summary

Japanese knotweed is a perennial, rhizomatous herb that grows from a large underground root system. Its young stems are edible and can be used as a spring vegetable, and its flowers provide early nectar for honeybees, producing a distinctive monofloral honey. Because it is a highly invasive plant, consuming or handling it should be done with care to avoid damage to native habitats and to ensure the plant is free of contaminants.

Source: https://en.wikipedia.org/wiki/Japanese_Knotweed

About Japanese Knotweed

Scientific NameReynoutria japonica
Safety Rating Use with Caution
Evidence Levellimited

Products Containing Japanese Knotweed

50 products from NIH DSLD database (verified label data)

ProductPrice
9-in-1 Saw Palmetto Prostate Support Gummies Natural Raspberry & Pomegranate Flavor -
AB Oxy Flavone -
Acetyl L-Carnitine Alpha Lipoic Acid -
Active Woman's Multi $27.54
Advanced Therapeutics Hypertrol Rx-Blood Pressure $38.12
Advanced Therapeutics Hypertrol Rx-Blood Pressure -
Advanced Therapeutics Hypertrol Rx-Blood Pressure -
Advanced Therapeutics Hypertrol Rx-Blood Pressure -
Advanced Therapeutics Hypertrol Rx-Blood Pressure -
Age-Less Trans-Resveratrol 250 mg $17.21
Age-Less Trans-Resveratrol 250 mg $17.21
Age-Less Trans-Resveratrol 500 mg -
Age-Less Trans-Resveratrol 500 mg -
AMPK Activator -
Amplify Mixed Berry Flavor $16.61
Anti-Aging Formula $47.86
BerryOxidants -
BerryOxidants -
BerryOxidants -
Bioforte $35.22
Bioforte -
Bioforte Resveratrol $16.70
Bio Quench -
Bio Quench Super Antioxidant -
Bio Span+ Bio-Enhanced 500 mg $31.51
BP Control $29.91
BP Control $29.91
BP Control -
BP Control $29.91
BP Natural -
BP Natural $38.88
Buckwheat Fagopyrum esculentum Alcohol Free -
Buckwheat Polygonum fagopyrum Alcohol Free $36.54
Buckwheat Polygonum fagopyrum Sugar Free -
Buckwheat Sugar Free Fagopyrum esculentum -
Cardio Sentials -
CardioSentials -
CardioSentials -
CardioSentials Cherry Berry Flavor $46.88
Catalyst -
Certified Men's Multivitamin -
Chinese Knotweed -
Chinese Knotweed -
Chinese Knotweed $9.33
Chinese Knotweed Alcohol Free -
Chinese Knotweed Alcohol Free -
Chinese Knotweed Non-Alcohol $33.68
Chinese Knotweed Non-Alcohol $27.82
Chinese Knotweed Sugar Free $18.53
Chinese Knotweed Sugar Free -

Products with Japanese Knotweed (from ingredient search)

151 products (showing max 200)

ProductIngredientAmountPrice
9-in-1 Saw Palmetto Prostate Support Gummies Natural Raspberry & Pomegranate Flavor Japanese Knotweed 250 mg -
AB Oxy Flavone Japanese Knotweed extract 100 mg -
Acetyl L-Carnitine Alpha Lipoic Acid Japanese Knotweed Root Extract 250 mg -
Age-Less Trans-Resveratrol 250 mg Japanese Knotweed root extract 500 mg -
Age-Less Trans-Resveratrol 250 mg Japanese Knotweed root extract 500 mg -
Age-Less Trans-Resveratrol 500 mg Japanese Knotweed root extract 800 mg -
Age-Less Trans-Resveratrol 500 mg Japanese Knotweed root extract 800 mg -
AMPK Activator Japanese Knotweed Root Extract 80 mg -
BP Natural Japanese Knotweed Root Extract 65 mg -
BP Natural Japanese Knotweed Root Extract 65 mg -
Cardio Sentials Japanese Knotweed (root) extract 25 mg -
CardioSentials Japanese Knotweed (root) extract 25 mg -
CardioSentials Japanese Knotweed (root) extract 25 mg -
CardioSentials Cherry Berry Flavor Japanese Knotweed (root) extract 25 mg -
Certified Men's Multivitamin Japanese Knotweed root extract 8 mg -
Clinical Resveratrol Japanese Knotweed 150 mg -
Clinical Resveratrol 500 mg Japanese Knotweed 500 mg -
Clinical Resveratrol 500 mg Japanese Knotweed 500 mg -
Clinical Trans-Resveratrol Japanese Knotweed 500 mg -
Clinical Trans-Resveratrol 150 mg Japanese Knotweed 150 mg -
Clinical Trans-Resveratrol 150 mg Japanese Knotweed 150 mg -
Clinical Trans-Resveratrol 500 mg Japanese Knotweed 500 mg -
Clinical Trans-Resveratrol 500 mg Japanese Knotweed 500 mg -
Collagen Enhance 1000 mg Wild natural Japanese Knotweed Extract 200 mg -
Curcuma NF-kB Cardiovascular Liquid Phyto-Caps Japanese Knotweed root extract 30 mg -
Curcuma NF-kB Cardiovascular Liquid Phyto-Caps Japanese Knotweed root extract 30 mg -
Daily Power Packs For Men Japanese Knotweed (Polygonum cuspidatum) root extract 5 mg -
Daily Power Packs For Women Japanese Knotweed (Polygonum cuspidatum) root extract 5 mg -
DHT Advanced Hair Formula with Biotin Japanese Knotweed Extract 100 mg -
Double Strength Clinical Resveratrol Japanese Knotweed 300 mg -
Essential Antioxidant DX Japanese Knotweed 75 mg -
Extend Plus Japanese knotweed root extract 25 mg -
Extra Strength Researched Resveratrol 300 mg Japanese Knotweed 300 mg -
Fortitude Japanese knotweed extract 0 NP -
Foundation Formula Japanese Knotweed 450 mg -
Foundation Formula Japanese Knotweed 450 mg -
Greens First Berry Japanese Knotweed Root Extract 15 mg -
Greens First Chocolate Japanese Knotweed Root Extract 50 mg -
Greens First Chocolate Japanese Knotweed Root Extract 50 mg -
Greens First Pro Berry Flavor Japanese Knotweed root extract 25 mg -
Healthy Aging Japanese Knotweed (Polygonum cuspidatum) extract 200 mg -
Healthy Aging Antioxidant Complex Japanese Knotweed root extract 200 mg -
Healthy Aging Antioxidant Complex Japanese Knotweed 200 mg -
High Potency Resveratrol Japanese Knotweed 300 mg -
Immune Formula Japanese Knotweed root extract 100 mg -
InflaThera Japanese Knotweed Root Extract 2 mg -
Japanese Knotweed Japanese Knotweed 2500 mg -
Japanese Knotweed Japanese Knotweed 2500 mg -
Japanese Knotweed Japanese Knotweed 2500 mg -
Japanese Knotweed Japanese Knotweed 2500 mg -
Japanese Knotweed Supreme 750 mg Japanese Knotweed 750 mg -
Joint Formula Japanese Knotweed Root Extract 160 mg -
Joint Guard COX-2 Control Japanese Knotweed root extract 75 mg -
Jungamals SCS Japanese Knotweed extract 1.7 mg -
Maximum Strength Inflama-Dyne Japanese Knotweed (Polygonum cuspidatum) Root Extract 13 mg -
MenoSolve Plus Probiotics Original Mint Flavor Japanese Knotweed Root Extract 40 mg -
Men's High Potency Multivitamin Japanese Knotweed Extract 20 mg -
Mitochondrial Recharge Japanese Knotweed (Polygonum cuspidatum) extract 75 mg -
Mitochondrial Recharge Japanese Knotweed Extract 75 mg -
Move Matrix Japanese Knotweed 25 mg -
Orange Triad + Greens Orange Flavor Japanese Knotweed Root Extract 25 mg -
Phyto Benefits Japanese Knotweed Root Extract 50 mg -
Phyto Benefits Japanese Knotweed Root Extract 50 mg -
Phytocidal Japanese Knotweed Root Extract 200 mg -
Power Greens Premium Natural Berry Japanese Knotweed 40 mg -
Power Greens Premium Refreshing Berry Japanese Knotweed 40 mg -
Power Greens Premium Refreshing Berry Japanese Knotweed (Polygonum cuspidatum) (root) extract 40 mg -
Power Greens Premium Refreshing Berry Japanese Knotweed Root Extract 40 mg -
PQQ-MitoRestore organic Japanese Knotweed root extract 235 mg -
Premium Organic Japanese Knotweed Japanese Knotweed extract 0 NP -
Pro-Antho Forte Japanese Knotweed root extract 50 mg -
Project Liver Support Japanese Knotweed Root Extract 16 mg -
Prothrivers Wellness Flavonoid Complex Japanese Knotweed Extract 150 mg -
ProvexCV Japanese Knotweed Rhizome, Root Extract 60 mg -
pTeroBlue Pterostilbene Blueberry Complex 350 mg Japanese Knotweed (Polygonum cuspidatum) (root) extract 250 mg -
pTeroBlue Pterostilbene + Resveratrol Blueberry Complex 350 mg Japanese Knotweed (Polygonum cuspidatum) (root) extract 250 mg -
pTeroBlue Pterostilbene +Resveratrol Blueberry Complex 350 mg Japanese Knotweed (Polygonum cuspidatum) (root) extract 250 mg -
Purple Defense Japanese Knotweed root extract 100 mg -
Purple Defense Japanese Knotweed root extract 100 mg -
Q-Veratrol Antioxidant Japanese Knotweed root extract 200 mg -
Q-Veratrol Antioxidant Japanese Knotweed root extract 200 mg -
Raw Superfoods Greens Blend Veggie Greens Flavor Japanese Knotweed root extract 50 mg -
Resplenish Japanese Knotweed Extract 200 mg -
Resveragen Japanese Knotweed Root Extract 500 mg -
Resveratol 500 mg Japanese Knotweed root extract 800 mg -
Resveratol 500 mg Japanese Knotweed root extract 800 mg -
Resveratol 500 mg Japanese Knotweed Root Extract 800 mg -
Resveratrol Japanese Knotweed 200 mg -
Resveratrol Japanese Knotweed (Polygonum cuspidatum) root extract 500 mg -
Resveratrol Japanese Knotweed extract 150 mg -
Resveratrol Japanese Knotweed powder 1000 mg -
Resveratrol Japanese Knotweed root extract 200 mg -
Resveratrol Japanese Knotweed 1000 mg -
Resveratrol Japanese Knotweed Root Extract 50 mg -
Resveratrol Japanese Knotweed root extract 400 mg -
Resveratrol Japanese Knotweed 1000 mg -
Resveratrol Japanese Knotweed Root Extract 50 mg -
Resveratrol Japanese Knotweed 200 mg -
Resveratrol Japanese Knotweed extract 75 mg -
Resveratrol Japanese Knotweed 200 mg -
Resveratrol Japanese Knotweed root extract 500 mg -
Resveratrol Japanese Knotweed (Polygonum cuspidatum) root extract 500 mg -
Resveratrol Japanese Knotweed (root & rhizome) extract 150 mg -
Resveratrol 125 mg Wild natural Japanese Knotweed Extract 250 mg -
Resveratrol 150 Japanese Knotweed root extract 372 mg -
Resveratrol 150 Japanese Knotweed (Polygonum cuspidatum) root extracts 672 mg -
Resveratrol 150 Japanese Knotweed root extract 672 mg -
Resveratrol 150 Liquid Phyto-Caps Japanese Knotweed root extract 372 mg -
Resveratrol 150 mg Japanese Knotweed 300 mg -
Resveratrol 150 mg Japanese Knotweed 300 mg -
Resveratrol 200 mg Japanese Knotweed Rhizome, Root Extract 400 mg -
Resveratrol 200 mg Japanese Knotweed Rhizome, Root Extract 400 mg -
Resveratrol 250 mg Japanese Knotweed root extract 500 mg -
Resveratrol 250 mg Japanese Knotweed root extract 500 mg -
Resveratrol 250 mg Japanese Knotweed root extract 500 mg -
Resveratrol 250 mg Japanese Knotweed root extract 500 mg -
Resveratrol 250 mg Japanese Knotweed Root Extract 500 mg -
Resveratrol 250 mg Wild natural Japanese Knotweed Extract 500 mg -
Resveratrol 500 mg Japanese Knotweed root extract 800 mg -
Resveratrol 500 mg Japanese Knotweed root extract 800 mg -
Resveratrol 500 mg Wild natural Japanese Knotweed Extract 1000 mg -
Resveratrol 500 mg Wild natural Japanese Knotweed Extract 1000 mg -
Resveratrol Extra Japanese Knotweed (Polygonum cuspidatum) extract 200 mg -
Resveratrol Japanese Knotweed 225 mg Japanese Knotweed Rhizome, Root Extract 225 mg -
Resveratrol Maximum Strength Japanese knotweed root extract 700 mg -
Resveratrol Plus Japanese Knotweed (Polygonum cuspidatrum), root, dried extract 500 mg -
Resveratrol Plus Japanese Knotweed 150 mg -
Resveratrol Synergistic Formula Japanese Knotweed 150 mg -
Skin Support Complex Japanese Knotweed extract 150 mg -
Super Cross Japanese Knotweed (Polygonum cuspidatum) root extract 300 mg -
Super Greens Japanese Knotweed Root Extract 10 mg -
Super Strength Researched Resveratrol 500 mg Japanese Knotweed 500 mg -
TESTOFX Japanese Knotweed Root Extract 50 mg -
Thyroid Strong Japanese Knotweed 150 mg -
Thyroid Strong Japanese Knotweed 150 mg -
Tick Immune Support Japanese Knotweed 800 mg -
Tick Immune Support Japanese Knotweed 800 mg -
Trans-Resveratrol Japanese Knotweed 500 mg -
TriPower Japanese Knotweed (Polygonum cuspidatum) root extract 80 mg -
Turmeric Supreme Heart Japanese Knotweed root extract 30 mg -
Turmeric Supreme Heart Japanese Knotweed root extract 30 mg -
Turmeric Supreme Heart Japanese Knotweed root extract 30 mg -
Turmeric Supreme Heart Japanese Knotweed Root Extract 30 mg -
Turmeric Supreme Heart Japanese Knotweed root extract 30 mg -
Turmeric Supreme Heart Japanese Knotweed root extract 30 mg -
Virility+ Japanese Knotweed Root Extract 20 mg -
Vitamin K2 + Resveratrol Japanese Knotweed Root Extract 100 mg -
Wholesome Greens Superfood Berry Flavor Japanese Knotweed extract 35 mg -
Wholesome Greens Super Food Dutch Chocolate Flavor Japanese Knotweed extract 35 mg -
Wholesome Greens Super Food French Vanilla Flavor Japanese Knotweed extract 35 mg -
Wholesome Greens Super Food Natural Flavor Japanese Knotweed extract 35 mg -

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Research

Ask the RAG about Japanese Knotweed — get evidence-based answers from WHO monographs and pharmacognosy textbooks.

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