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Methylisothiazolinone in skincare: is it safe?

What it is

Methylisothiazolinone is an ingredient Klyva classifies under Other.

Is it safe?

Klyva flags Methylisothiazolinone at high concern. Preservative; a well-documented contact allergen.

Source: SCCS opinion on methylisothiazolinone

Quick answers

Does it clog pores?Not flagged by Klyva

Frequently asked questions

Is Methylisothiazolinone safe?

Klyva flags Methylisothiazolinone at high concern. Preservative; a well-documented contact allergen. Source: SCCS opinion on methylisothiazolinone.

Does Methylisothiazolinone clog pores?

Methylisothiazolinone is not flagged as pore-clogging by Klyva — though absence from the list isn't proof it's non-comedogenic for every skin.

Evidence

  • SCCS opinion on methylisothiazolinone

Assessed with Klyva's published scoring method →