Welcome to MI Free


MI Free is a resource for information about allergy to the preservative methylisothiazolinone (MI) and its relatives, such as methylchloroisothiazolinone (MCI), which are found widely in cosmetics, toiletries, household cleaning products and other domestic products such as paints.

Increasing numbers of consumers worldwide are developing serious and debilitating allergies to these ‘isothiazolinone’ preservatives, and the epidemic shows little sign of slowing down.

Those with allergy to MI often struggle to find what they need – such as lists of safe products, how to obtain a medical diagnosis or help with their problem, and information on the labelling of isothiazolinone preservatives on consumer products. This site aims to answer those questions. 

To navigate the site, use the drop-down menu at the top. For some of the most popular and recent articles, see below.


Hair Loss Products
Looking for hair loss fighters or hair thickeners? Hair products are notorious for containing MI and MCI, but there are plenty of treatments for hair and scalp, both cosmetic and medical, which are safe to use. 


Clarins is a very popular French and international cosmetics house, but how MI-allergy friendly is it? Many products are safe – but over a dozen aren’t. Here’s a list of those to avoid. 



11101-2t-2Volumizing Conditioners
Looking for conditioners to give you extra body or to tackle fine hair – but which are also guaranteed MI / MCI free? Here’s a list of some worth trying from all corners of the globe. 




PPD Allergy and MI Allergy
If you’re looking to dye your hair and you have an allergy to MI – and to other ingredients, such as PPD, TDS, fragrances and artificial colours – you need to tread very carefully with the dye or colour you choose. Here are some recommendations.


Fragrance-Free-Shampoo-425f729_main-2Methylisothiazolinone Free Shampoo
One of the most sought-after MI-free products is shampoo, as so many high-street brands use this preservative in their formulations. Here is a listing of a number of safe products. 



colgate2 copyWhat other names are there for MI?
You won’t always see the word ‘methylisothiazolinone’ on a product to warn you it’s there – or the names of other isothiazolinones, since each has a variety of names, from chemical to brand names. Here’s a list of the most common – along with some safe ‘false enemies’.

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