Ingredient
Methylisothiazolinone
Potent preservative that became the 'Contact Allergen of the Year' in 2013. Now restricted in leave-on products in EU.
Methylisothiazolinone is a powerful biocide used in rinse-off products at ≤0.0015% to prevent microbial spoilage. Its use in leave-on cosmetics is restricted in many regions due to sensitisation concerns.
Also known as
Categories
Low concern
Methylisothiazolinone has a low comedogenic rating and is unlikely to clog pores.
Low concern
Methylisothiazolinone is considered safe for fungal-acne-prone skin.
Some caution
Methylisothiazolinone may require caution during pregnancy. Consult your doctor. Reason: high-sensitising preservative with restricted use.
Higher concern
Methylisothiazolinone is commonly associated with skin irritation or sensitisation. Reason: high-sensitising preservative linked to allergic contact dermatitis.
Common Questions
What is Methylisothiazolinone used for?
Can Methylisothiazolinone clog pores?
Is Methylisothiazolinone fungal acne safe?
Is Methylisothiazolinone commonly irritating?
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Educational purposes only. Always consult a dermatologist for personalised guidance.