
Polygonum cuspidatum (Japanese Knotweed)
Japanese Knotweed is a broad-spectrum herb with potent antimicrobial, antifungal, anti-inflammatory, and immunomodulatory properties. It crosses the blood-brain barrier, making it particularly effective for addressing neurological symptoms associated with Lyme disease and other infections. It helps reduce inflammation in the brain and central nervous system, providing relief from cognitive issues, headaches, and other neuroinflammatory conditions.
Japanese Knotweed also improves blood flow and restores microcirculation, benefiting both cardiovascular health and inflammatory arthritis. As a natural source of resveratrol, it offers powerful antioxidant and cardioprotective benefits. Beyond its role in treating infections, it is neuroprotective and may help reduce the risk of Alzheimer’s and other dementias. Its comprehensive effects make it a valuable herb for managing Lyme, supporting neurological health, and improving overall circulation.
*Japanese Knotweed is also available in powder and capsules.
Japanese Knotweed is a broad-spectrum herb with potent antimicrobial, antifungal, anti-inflammatory, and immunomodulatory properties. It crosses the blood-brain barrier, making it particularly effective for addressing neurological symptoms associated with Lyme disease and other infections. It helps reduce inflammation in the brain and central nervous system, providing relief from cognitive issues, headaches, and other neuroinflammatory conditions.
Japanese Knotweed also improves blood flow and restores microcirculation, benefiting both cardiovascular health and inflammatory arthritis. As a natural source of resveratrol, it offers powerful antioxidant and cardioprotective benefits. Beyond its role in treating infections, it is neuroprotective and may help reduce the risk of Alzheimer’s and other dementias. Its comprehensive effects make it a valuable herb for managing Lyme, supporting neurological health, and improving overall circulation.
*Japanese Knotweed is also available in powder and capsules.
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PRODUCT DETAILS
INGREDIENTS
CLINICAL USES
| Antimicrobial | Effective against Borrelia (Lyme disease) and some co-infections like Babesia, Bartonella, Mycoplasma, and Ehrlichia, due to its strong antibacterial properties. |
| Herxheimer Reaction Support | Known to help manage Herxheimer reactions, reducing inflammation, fatigue, and discomfort that can occur when starting antimicrobial treatments. |
| Antioxidant | High in resveratrol, it provides potent antioxidant protection, reducing oxidative stress and supporting overall cellular health during chronic illness. |
| Anti-Inflammatory | Reduces systemic inflammation, helping to alleviate joint pain, muscle stiffness, and neurological symptoms commonly seen in Lyme disease. |
| Immune Modulation | Modulates the immune system, supporting both immune activation and regulation, particularly helpful in chronic Lyme disease where immune dysregulation is common. |
| Liver Detoxification | Supports liver function, enhancing detoxification processes, which is important for patients undergoing intensive antimicrobial treatments. |
| Neuroprotective | Supports neurological health, helping to manage symptoms like brain fog, cognitive dysfunction, and nerve pain often associated with neuroborreliosis. |
| Cardiovascular Support | May help improve circulation and reduce cardiovascular symptoms related to Lyme disease or co-infections, particularly Babesia or Bartonella. |
RECOMMENDED DOSAGE
CAUTIONS & WARNINGS
Synergistic Products:
61 reviews for Polygonum cuspidatum (Japanese Knotweed)
Additional Information About Polygonum cuspidatum (Japanese Knotweed)

References
- 1. The Constituents of Medicinal Plants - An introduction to the chemistry and therapeutics of herbal medicine. 2nd edition. By Andrew Pengelly.
- 2. Herbal Antivirals - Natural Remedies for Emerging & Resistant Viral Infections. By Stephen Harrod Buhner
- 3. Natural Treatments For Lyme Coinfections - Anaplasma, Babesia, and Ehrlichia. By Stephen Harrod Buhner
- 4. Healing Lyme. Natural Healing of Lyme Borreliosis and the Coinfections Chlamydia and Spotted Fever Rickettsioses. By Stephen Harrod Buhner.
- 6. Advances for pharmacological activities of Polygonum cuspidatum - A review. Jia Ke et al. Pharm Biol. 2023 Dec;61(1):177-188. doi: 10.1080/13880209.2022.2158349. https://pubmed.ncbi.nlm.nih.gov/36620922/
- 7. Emodin: A Review of its Pharmacology, Toxicity and Pharmacokinetics. Xiaoxv Dong et al. Phytother Res. 2016 Aug;30(8):1207-18. doi: 10.1002/ptr.5631. Epub 2016 May 18. https://pubmed.ncbi.nlm.nih.gov/27188216/
- 8. Polygonum Cuspidatum Alcohol Extract Exerts Analgesic Effects via the MAPK/ERK Signaling Pathway. Yan Lan et al. Drug Des Devel Ther. 2023 Oct 19:17:3151-3167. doi: 10.2147/DDDT.S420002. eCollection 2023. https://pubmed.ncbi.nlm.nih.gov/37876500/
- 9. Resveratrol and Its Effects on the Vascular System. Johannes M Breuss et al. Int J Mol Sci. 2019 Mar 27;20(7):1523. doi: 10.3390/ijms20071523. https://pubmed.ncbi.nlm.nih.gov/30934670/
- 10. Health benefits of resveratrol administration. Sabina Galiniak et al. Acta Biochim Pol. 2019 Feb 28;66(1):13-21. doi: 10.18388/abp.2018_2749. https://pubmed.ncbi.nlm.nih.gov/30816367/
- 11. Potential Adverse Effects of Resveratrol: A Literature Review. Abdullah Shaito et al. Int J Mol Sci. 2020 Mar 18;21(6):2084. doi: 10.3390/ijms21062084. https://pubmed.ncbi.nlm.nih.gov/32197410/
FAQ
What makes Apex Botanical tinctures different from other herbal tinctures?
Our tinctures stand out due to the premium quality of herbs we use. Crafted at a concentration of 1:4, our herbal tinctures prioritize both potency and effectiveness.
Unlike many other companies that employ a uniform alcohol percentage across all products, our approach is nuanced. We tailor the alcohol concentration for each herb based on the distinct medicinal properties of the plant.
This strategy reflects our commitment to a sophisticated extraction of medicinal compounds, effectively setting Apex Botanicals apart in the realm of herbal tinctures.
How should I consume my herbal tincture?
Herbal tinctures are generally taken on an empty stomach (1 hour before and after meals). They can be taken directly or added to 1oz of water if the taste is hard to swallow.
Dosing of herbal tinctures will generally vary from 1 drop once per day up to 1 tsp 3 times per day. When taking anti-microbial herbal tinctures, starting at a lower dose and increasing slowly is the general rule of thumb.
*Be sure to speak with your primary care provider to determine the correct dose for your needs.
How long should I take my herbal tincture for?
The length of time a tincture should be taken will vary considerably based on your state of health, the infection / symptom you’re trying to treat and other medications or treatments you are concurrently taking.
Most people with chronic tick-borne infections take an herbal tincture for between 3 months and 2 years.
As a general rule, its recommended to take an herbal tincture for at least 1 month to see the best results.
Are herbal tinctures safe for children?
Generally speaking, it is safe for children to consume herbal tinctures, but dosing should be adjusted. Refrence 'Clarks Rule' for further information.
*Always consult your primary care provider before starting a new protocol or giving your child herbal tinctures.
Are herbal tinctures safe during pregnancy or while breastfeeding?
Some herbs are strictly contraindicated in pregnancy and should be avoided. We do our best to indicate this on the product information page but are not held liable for any errors or omissions.
If you are pregnant or breastfeeding consult your primary care provider before consuming any herbal tinctures.
Will my herbal tincture interact with medications or supplements?
Interactions of herbal tinctures with medications or supplements do exist. We strongly recommended consulting with your primary care provider or pharmacist before taking any herbal tinctures if you are concerned about potential contraindications.
What does a 1:4 ratio imply and how does it compare to 1:2 or 1:5+?
The ratio describes the concentration of a tincture. We use a 1:4 ratio, meaning 1 part dried herb (in grams) to 4 parts menstruum (the combined alcohol and herb).
A ratio of 1:5 has more liquid to the same amount of herb and is therefore more diluted.
A ratio of 1:10 or higher is very diluted and requires very high daily doses and is not recommended.
Tinctures made at 1:2 are often too concentrated for Lyme patients and commonly induce Herx reactions that can be very intense.
Most tinctures on the market are made at 1:5. We’ve chosen to use 1:4 to ensure greater potency while still being very safe and tolerable.
Does higher alcohol content mean an herbal tincture is more or less potent?
Using the correct alcohol percentage to extract the specific medicinal constituents of that herb is of highest importance when making a tincture. Using more or less alcohol essentially reflects the chemical nature of the compounds that we want to extract into the liquid portion.
A tincture made at 40% versus one made at 80% is not twice at strong. It simply implies that for the first herb, 40% alcohol will optimally extract the medicinal qualities. For the second herb, 80% is the concentration for optimal extraction.
We’ve gone to great lengths to ensure that our tinctures are made using the correct concentrations.
*Please note that not all herbal tinctures on the market are made with the appropriate alcohol concentration so use our site as a reference or conduct your own research to make sure you’re purchasing the best formulated tincture possible.
Click here to read our complete list of Frequently Asked Questions.
SHARING THE GIFT OF WELLNESS
Free Herbal Protocol Guide for Lyme & Co-Infections
This comprehensive educational guide, developed by our Medical Director, Dr. Sal Meli ND, provides evidence-based insight into the physiological mechanisms of tick-borne infections and the supportive role of botanicals in addressing these challenges.
This resource is designed to simplify complex concepts and empower readers to make informed decisions about their approach to tick-borne infections.





Took weeks. But the deep bone ache is less intense now and sleeping better
Head pressure finally backed off. I can think straighter again.
Thoughtful packaging. i put in a big order and everything arrived perfectly
For me this reduced the constant internal buzzing and over-stimulation. I can tolerate brighter lights and noisy environments better than before. It stacked well with my other herbs and didn’t upset my stomach, which is rare. Took about 3 weeks to really notice it.
same as previous response