Knotgrass Extract Powder

Knotgrass extract is made from the aerial parts of Polygonum aviculare, the common knotweed known in Chinese trade as bian xu, with the root excluded. Water extraction concentrates the soluble herb fraction, and the liquor is dried into a green powder that disperses in water.

The extract is supplied at a 10:1 ratio and milled to 80 mesh, with no marker percentage declared. A pure avicularin compound is listed separately, so this knotgrass extract is the whole-herb option for formulas that do not name a single flavonoid.

SKU: BOT-BEX-0408 Category: Botanical Extracts Tags: Gummies & Chews, Leaf & Herb, Plant Extracts, Sports Nutrition, Water Dispersible, Water Extracted

Polygonum aviculare Identity & Plant Part

The botanical entity is Polygonum aviculare L., knotgrass, a prostrate annual of the Polygonaceae with wiry stems, small blue-green leaves and tiny flowers in the leaf axils. The part used is the aerial part, meaning stem, leaf and flower together. The root is not part of this ingredient. The related Fallopia multiflora, sold as he shou wu, is a different plant, and other knotweeds in the same family are separate species. Flavonol glycosides, phenolic acids, tannins and silica are the main constituent families of knotgrass, named here without figures.

Knotgrass Extract vs Other Forms

Form	What It Is	Choose It When
10:1 Herb Extract	Water-extracted, concentrated and dried knotgrass aerial parts	Whole-herb extract without a marker claim
Avicularin 98%	Isolated avicularin as a single compound	A single defined flavonoid is needed

The 10:1 ratio states concentration against the starting herb, and it is not an avicularin figure.

Avicularin is one of the flavonol glycosides of knotgrass, and the pure compound on the sibling page is built for formulas that must name it. This Polygonum aviculare extract holds the full water-soluble herb profile, where avicularin sits among related glycosides, phenolic acids and tannins. Because several knotweeds share common names and the Latin name decides identity, the species and the aerial part belong together on the order.

Typical Specifications

Specification Item	Product Information
Latin Name	Polygonum aviculare
Plant Part	Leaf & Herb
Processing	Water Extraction
Common Name	Bian Xu
Ingredient Type	Ratio Extract
Extract Ratio	10:1
Appearance	Green powder
Solubility / Dispersibility	Water Dispersible
Quality Parameters
Moisture (LOD)	≤5.0%
Total Ash	≤5.0%
Particle Size	80 mesh
Heavy Metals	Lead ≤2 ppm · Arsenic ≤1 ppm · Cadmium ≤1 ppm · Mercury ≤0.1 ppm
Microbiology	TPC ≤1,000 cfu/g · Yeast & Mold ≤100 cfu/g · E. coli Negative · Salmonella Negative/25 g
Shelf Life	24 months in unopened original packaging, cool and dry storage

Application Areas

Herb Extract Capsules

Knotgrass extract goes into two-piece capsules as a green powder with a faint hay-like note and a mild astringency. A flow aid in the premix prevents bridging of the fine powder, and an opaque shell protects the green color from light over shelf life.

Green Herbal Tea Mixes

In instant mixes the extract gives a hazy green-brown liquid with a mildly astringent taste. Lemon, mint and apple flavors suit it, and a soluble carrier keeps the small dose even from sachet to sachet.

Tablet Blends with Leafy Herbs

Direct compression works with the extract at moderate inclusion and microcrystalline cellulose as filler. The green tint can speckle a white core, so a colored film coat or a tinted tablet is the cleaner choice, and granulation reduces sticking on punches.

Apple-Style Gummy Premixes

Gummies add the extract to the cooked base late, and the green-brown tint suits apple, pear and lime flavors. Tannins in the herb can firm the gel slightly, so test texture on the finished line.

Dry Drink Stick Mixes

Sticks combine the extract with acid and a sweetener, giving a repeatable dose. Acid shifts leafy greens toward olive, so test the shade of the finished drink, and choose opaque film to protect the powder from light.

Formulation Notes

Knotgrass extract is a green powder with a faint hay-like aroma and a mildly bitter, astringent taste. Stirred into water, the powder gives a hazy green-brown liquid, and a fine sediment settles on standing. The astringency comes from tannins and phenolic acids and is more noticeable in dilute drinks.

Leaf water extracts take up moisture from the air, so weigh the knotgrass extract in a dry room and reseal the pack after each draw. Surface clumping and a dulling of the green are early signs of uptake. Blend with a flow carrier before filling capsules, and add the powder to the dry base of drinks.

Tannin-bearing powders darken on contact with iron, so use stainless steel or plastic scoops and mixers. Knotgrass extract also carries silica from the plant, which is mildly abrasive on soft tooling, and a check of punch and die wear over long tablet runs is routine.

Packaging & Commercial Supply

Essencefield supports product evaluation, formulation trials, commercial orders, and ongoing ingredient supply. Packaging, storage, and shipping arrangements are determined by product characteristics, order quantity, stability requirements, and destination-market needs.

Supply Item	General Information
Sample	Available upon request for formulation, testing, and supplier evaluation
Order Quantities	100 g · 1 kg · 5 kg · 25 kg · 100 kg · 500 kg · Bulk
Sample Lead Time	Typically 5–7 days after sample confirmation
Production Lead Time	Typically 15–30 days after order and specification confirmation
Packaging	Suitable protective inner packaging with bags, cartons, drums, or other appropriate outer packaging
Storage	Store in tightly sealed, suitable protective packaging in a cool, dry environment. Protect from moisture, heat, and direct sunlight. Specific storage conditions follow the approved product specification.
Documentation	COA · Product Specification · TDS · SDS · Applicable declarations (as applicable)

Final order quantities, lead times, packaging, documentation, and shipping arrangements are confirmed according to the selected product and commercial requirements.