Ingredient
Polyester-37 / Polyester-11
What is Polyester-37 / Polyester-11?
Polyester-37 and Polyester-11 are synthetic polymers primarily used in hair care products. They are crafted through chemical reactions that combine various monomers to create long polymer chains.
In hair care, these polyesters are utilized for their film-forming properties, helping to provide a conditioning effect and improve the texture and manageability of hair. The available evidence on their health implications is limited, focusing mainly on their functional role rather than health effects.
When found on a label, it indicates the product might have improved smoothness and shine owing to the filming properties of these polymers.
Commonly found in: hair conditioners, hair styling products, shampoos
Benefits
- Polyesters can enhance hair smoothness and manageability.
Polyesters used in cosmetics are not under stringent regulation, deemed generally safe for topical applications.
Research primarily focuses on the functional roles in cosmetics with limited information on health impacts.
These synthetic polyesters are typically vegan as they are made from non-animal-derived sources.
Sources: Hair Care Ingredients
Scout's take
Synthetic polyester polymer; classified as primary microplastic. No functional benefit to hair that clean alternatives don't provide.
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