Thiodipropionic Acid
What Thiodipropionic Acid is & what it does
Thiodipropionic Acid is a sulfur-containing dicarboxylic acid used in small amounts in cosmetic and sunscreen formulas. Its main role is as an antioxidant and stabilizer that helps protect the product from oxidation, which can extend shelf life and preserve the integrity of other ingredients. A notable property is that the sulfur atom in its structure is what gives it its antioxidant activity.
Is Thiodipropionic Acid safe?
Thiodipropionic Acid is used in small amounts in cosmetics as an antioxidant and is generally considered safe at the low levels used in formulas. It functions as a stabilizer rather than an active applied to the skin in large quantities. As with any ingredient, those with sensitive skin can patch test.
What does Thiodipropionic Acid do in skincare?
Thiodipropionic Acid works mainly as an antioxidant and stabilizer in skincare and sunscreen products. It helps protect the formula from oxidation, which can preserve the quality and shelf life of the product and protect other ingredients. It is used at low concentrations as a formulation aid.
Is Thiodipropionic Acid natural or synthetic?
Thiodipropionic Acid is a synthetic ingredient produced through chemical synthesis. It is a sulfur-containing dicarboxylic acid and does not have a common direct natural source used in cosmetics. Its function is purely as a formulation stabilizer.
Sunscreens with Thiodipropionic Acid
We rate 5 sunscreens that contain it:
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Avon Anew Reversalist Plump &smooth Day Cream SPF 20
65/100
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Avon Anew Platinum Day Cream Spf 25
65/100
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Avon Anew Ultimate Day Multi-performance Day Cream SPF 25
55/100
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Avon Anew Rejuvenate Day Revitalizing Cream SPF 25
54/100
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Avon Anew Reversalist Complete Renewal Broad Spectrum Spf 25 Day Cream
54/100