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Hu Zhang

Available Forms are, powders, cut, concentrated powder and tablets plus sizes are located below.


  • Astringent
  • Anti-inflammatory
  • Antiviral
  • Antifungal
  • Clears Heat
  • Resolves Dampness
  • Transforms Phlegm
  • Invigorates Blood
  • Dispels Stasis
  • Lung
  • Gallbladder
  • Liver

Other Names

  • Bushy Knotweed
  • Japanese Bushy Knotweed
  • Polygonum cuspidatum root & rhizome
  • Knotweed

Pin Yin Name

  • Hu Zhang

Caution / Drug Interaction

  • Do not use if pregnant or nursing

How to Use


About Hu Zhang

Hu Zhang is a slightly bitter herb, which has been used in Traditional Chinese Medicine, as a astringent, anti-inflammatory, anti-viral, and anti-fungal.  The main chemical component of this beneficial herb is the active ingredient called Resveratrol. Though you can find resveratrol in grapes and wine, most people prefer the Bushy Knotweed source.  Researchers contend that it's the key to the heart-healthy benefits. Scientific studies show that this antioxidant compound supports heart health, provides anti-aging benefits, and supports a healthy inflammatory response.

In the book Healing Lyme Disease and Coinfections by S. Buhner he states that Hu Zhang in bulk form is one of the main protocol herbs in healing Lyme.   He talks about the different forms such as standardized tablets, which are known as Resveratrol, bulk herb in powder and cut forms.  

In the Chinese Herbal Medicine book Materia Medica, Hu Zhang Radix (Rhizoma Polygoni Cuspidati) has alternative names as Da Chang Zhang and Ku Zhang. Its medicinal applications indicates that it invigorates the blood, dispels stasis, unblocks the channels, clears heat, discharges toxins and stops pain. Bushy Knotweed has been used for centuries in Traditional Chinese Medicine and has a wide range of beneficial properties. It has therapeutic benefits for several medical conditions.

Resveratrol kills cancer cells naturally by inducing apoptosis (also called programmed cell death) while leaving healthy cells unharmed. It does this by converting lipids (or fats) in tumor cells into molecules called ceramides. For example, researchers found that resveratrol causes breast cancer cells to die off in this manner. This information is found in Journal Medicinal Chemistry 48: 6783-86, 2005.

When starting a regimen with a new herb, we suggest the following:   First, purchase a form of the herb which you are willing to use.  For example, if you don't drink tea, then pass on the sliced form and get the powder instead to make capsules.  Second, start slowly and don't over do it.  Lastly, and perhaps most important, write down the herb's benefits on a calendar.  Chart your progress.  Sometimes herbs produce subtle changes, and such may not be noticed. But when you look back at your calendar, you will notice the improvement. No, you don't have to write an essay on how you feel, a simple "+" or "-" sign is good enough.  This charting has helped so many people and is such a simple idea!


Good Manufacturing Practices (GMPs) are guidelines that govern the manufacturing process of a product to ensure that the quality and safety of the product is consistent. To ensure compliance and traceability, each step of the manufacturing process must be documented and adhere to its defined guidelines. By documenting the manufacturing process, validating the equipment used, and following preset guidelines, we ensure the quality of each lot of our products.

Each batch of herbs is dual-lab tested by in-house lab and independent third party lab. In-house lab is equipped with instruments such as a high performance liquid chromatograph, moisture determination meter, Fourier transform infrared spectrometer, atomic absorption spectrophotometer, gas chromatograph, etc.

In addition, the following additional tests are performed:

  • Microbacteria
  • Pesticides - over 200 pesticides tested for (Uab 2000 screen).
  • Heavy Metals - Lead, Mercury and Arsenic

Packaging and Storage
Processing and storage standards make the difference in preserving the quality of our herbs. Our herbs have a shelf life of 24-36 months. Our natural herbs retain their freshness and quality without added preservatives. Special measures are taken to store the herbal materials to maintain their optimum required conditions for humidity, temperature and protection from light.

Healing Lyme Disease by S. Buhner