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HOW WE DETERMINE SCORES Learn more About EWG VERIFIED®

Data: Limited

Polygonum Cuspidatum (Japanese Knotweed) Root Extract

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Other Concerns

SYNONYMS

● POLYGONUM CUSPIDATUM ROOT EXTRACT
● POLYGONUM CUSPIDATUM (JAPANESE KNOTWEED) ROOT EXTRACT
● JAPANESE KNOTWEED ROOT EXTRACT

This ingredient is not currently on EWG's Skin Deep Restricted or Unacceptable Lists.

Polygonum Cuspidatum Root Extract is an extract of the roots of Polygonum cuspidatum.

Common concerns

See how this product scores for common concerns.

  • LOW
    Cancer
  • LOW
    Allergies & Immunotoxicity
  • LOW
    Developmental and Reproductive Toxicity
  • LOW
    Use Restrictions

Ingredient concerns

  • CONCERNS
  • DATA SOURCES

Products with this Ingredient

Expand content Collapse content
facial cleanser12 products
shaving cream1 products
facial moisturizer/treatment30 products
mask36 products
makeup remover3 products
makeup primer7 products
toners/astringents6 products
serums & essences23 products
baby lotion1 products
lip gloss6 products
around-eye cream9 products
anti-aging3 products
oil controller1 products
foot cleansing1 products
moisturizer7 products
exfoliant/scrub5 products
depilatory6 products
concealer36 products
foundation53 products
body wash/cleanser1 products
hair treatment/serum5 products
lipstick29 products
eye shadow5 products
shampoo1 products
lip balm3 products
daily use with SPF10 products
foot odor control1 products
body firming lotion3 products
CC cream1 products
hand cream1 products
recreational sunscreen1 products

Understanding scores

Cosmetics and personal care products are not required to be tested for safety before being allowed on the market. The Skin Deep® scoring system was designed to help the public understand whether a product is safe to use or whether it contains ingredients of concern.

Every product and ingredient in Skin Deep gets a two-part score – one for hazard and one for data availability. The safest products score well by both measures, with a low hazard rating and a fair or better data availability rating.


HOW WE DETERMINE SCORES

Hazard score

The Skin Deep ingredient hazard score, from 1 to 10, reflects known and suspected hazards linked to the ingredients. The EWG Verified® mark means a product meets EWG’s strictest criteria for transparency and health.

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WEIGHT-OF-EVIDENCE APPROACH

A product’s hazard score is not an average of the ingredients’ hazard scores. It is calculated using a weight-of-evidence approach that factors in all of the hazards or health impacts associated with the ingredients.

Data availability

The Skin Deep data availability rating reflects the number of scientific studies about the product or ingredient in the published scientific literature.

NONE LIMITED FAIR GOOD ROBUST
Low Availability
Moderate Availability
High Availability
NONE

Ingredients have not been assessed.

LIMITED-FAIR

There is only a modest volume of research.

GOOD-ROBUST

Ingredients have been studied extensively.

Can’t find your product?

Enter the ingredients in EWG’s Build Your Own Report tool to get an approximate score for that product.

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