Ingredient guide
Methylisothiazolinone in Face Moisturizer
What Methylisothiazolinone does in face moisturizer and how it's regulated.
About Methylisothiazolinone
A powerful synthetic biocide and preservative.
Why brands use it in face moisturizer
Other manufacturers use it as an antimicrobial preservative, especially in water-based formulations.
Regulatory status
- US FDA: Still permitted in US cosmetics with no concentration limits. Not banned despite international restrictions.
- European Union: Not permitted in cosmetics
- Canada: Restricted in cosmetics
Common alternatives
Other ingredients formulators use for a similar job in face moisturizer:
potassium sorbate
sodium benzoate
ethylhexylglycerin
rosemary extract
FAQ
What is Methylisothiazolinone?
A powerful synthetic biocide and preservative.
Why is Methylisothiazolinone used in face moisturizer?
Other manufacturers use it as an antimicrobial preservative, especially in water-based formulations.
How is Methylisothiazolinone regulated?
Still permitted in US cosmetics with no concentration limits. Not banned despite international restrictions. It is not permitted in cosmetics sold in the EU. Canada restricts its use in cosmetics.
Does Numbrrrz lip balm contain Methylisothiazolinone?
No. Numbrrrz is organic coconut oil, organic beeswax, organic jojoba oil and vitamin E, plus organic essential oils or flavoring in the scented versions. That is a formulation choice, not a judgment about other products.
