PlainVitamins

botanical

Knotweed supplements

Half of the 9 knotweed supplements in the NIH label database that print an amount list 800 mg or less per serving; the middle half list 50 mg to 983 mg (DSLD version 9.4.0, January 2026).

Products listing it
309 print an amount; 21 list it inside a blend without an amount
Median per serving
800 mgmiddle half 50 mg to 983 mg

How much knotweed do supplements contain?

The median product lists 800 mg per serving. One in ten lists 36 mg or less, one in ten 1,156 mg or more. The amount printed most often is 800 mg (2 products).

Products by amount of knotweed per serving

9 products, log scale; extreme 0.2% at each end left out of the drawing.

Knotweed: products by amount per serving30 mg100 mg300 mg
Knotweed: products by amount per serving30 mg100 mg300 mg
Knotweed: products by amount per serving30 mg100 mg300 mg
Knotweed: products by amount per serving30 mg100 mg300 mg1,000 mg
Knotweed: products by amount per serving30 mg100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
800 mg2 Tick Immune Support (ZenMen)
983 mg2 Knotgrass (Herbal Terra); Knotgrass (Hawaii Pharm)
1,156 mg2 Knotgrass Alcohol Free (Herbal Terra); Knotgrass Non-Alcohol (Hawaii Pharm)
20 mg1 Men's High Potency Multivitamin (Swisse Ultivite)
40 mg1 Power Greens Premium Natural Berry (NuMedica)
50 mg1 Cogni Defend (Clean Nutraceuticals)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most knotweed?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

In which products and brands?

Products listing knotweed by DSLD product type

Knotweed by product typeOther Combinations5Botanical4
Knotweed by product typeOther Combinations5Botanical4
Knotweed by product typeOther Combinations5Botanical4
Knotweed by product typeOther Combinations5Botanical4
Knotweed by product typeOther Combinations5Botanical4

Brands listing it most: Herbal Terra (2), Hawaii Pharm (2), Swisse Ultivite (1), NuMedica (1), Clean Nutraceuticals (1), ZenMen Your Natural Pantry (1), ZenMen (1).

Every product listing knotweed

30 products, A to Z by name (page 1 of 1), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?