Polyquaternium-37
What Polyquaternium-37 is & what it does
Polyquaternium-37 is a synthetic cationic (positively charged) polymer used widely in skincare and haircare. In a formula it works primarily as a thickener and texture modifier, helping to stabilize emulsions and give creams and gels a smooth, cushiony feel. It is a common rheology agent in lightweight sunscreen and moisturizer bases.
What does Polyquaternium-37 do in skincare?
Polyquaternium-37 works mainly as a thickener and texture modifier, helping to stabilize emulsions and give creams and gels a smooth, cushiony feel. It is a common rheology agent in lightweight sunscreen and moisturizer bases. It is included for formulation performance rather than as an active skincare ingredient.
Is Polyquaternium-37 safe?
Polyquaternium-37 is a synthetic polymer used widely in skincare and haircare, and it is generally considered safe at the concentrations used in cosmetics. It mostly stays on the surface and functions as a texture and stabilizing agent. As with any ingredient, patch testing is reasonable if you have sensitive skin.
Is Polyquaternium-37 vegan?
Polyquaternium-37 is a synthetic polymer and is not derived from animals, so the ingredient itself is generally considered vegan-suitable. Whether a finished product is vegan still depends on its other ingredients and the brand's practices. Checking the brand's labeling or certification is the best way to confirm.
Sunscreens with Polyquaternium-37
We rate 4 sunscreens that contain it:
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biotrade cosmeticals Melabel Sunsun Protection Cream SPF 50+
71/100
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Aurelderma Uvedge Tinted Sunscreen SPF 50 Lotion
59/100
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Bali boat Sun Protection Spray SPF 50
59/100
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Belo Essentials Belo Sunexpert Body Shield SPF 60, PA+++
57/100