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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

● JAPANESE KNOTWEED ROOT EXTRACT
● POLYGONUM CUSPIDATUM (JAPANESE KNOTWEED) ROOT EXTRACT
● POLYGONUM CUSPIDATUM 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
foundation33 products
facial moisturizer/treatment17 products
mask16 products
concealer12 products
serums & essences9 products
facial cleanser6 products
moisturizer5 products
around-eye cream4 products
makeup remover3 products
toners/astringents2 products
depilatory2 products
makeup primer2 products
exfoliant/scrub2 products
body firming lotion2 products
foot cleansing1 products

Data gaps

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CONCERN REFERENCE
178 studies in PubMed science library may include information on the toxicity of this chemicalNLM PubMed
  • NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.

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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