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This ingredient functions as a preservative in cosmetic products, preventing the growth of bacteria, yeast, and mold. It helps to keep products safe and effective by extending their shelf life.
No specific concern data available
Safety summary
METHYLISOTHIAZOLINE is a known contact allergen and sensitizer, particularly in leave-on products or at higher concentrations. Regulatory bodies have significantly restricted its use in cosmetics due to concerns about allergic reactions.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.