t +44 (0)1403 740350

Why don't you use methylisothiazolinone (MI) in Green People products?

Share With Your Friends

natural preservatives used in our products

Green People’s organic beauty products do not use methylisothiazolinone as a preservative. Green People use a range of mild preservatives including potassium sorbate, sodium benzoate, levulinic acid and sorbic acid which are all generally very well tolerated by the majority of people.

- See our MI-free moisturisers

- See our MI-free shampoos

- See all MI-free products

methylisothiazolinone linked to contact dermatitis

What has been described by doctors as the worst skin allergy ‘epidemic’ many have ever seen has been linked to an increased use of the preservative methylisothiazolinone, also known as MI.

The preservative MI has been used over the last 10 years in much higher doses than ever before, and has reportedly lead to what has been described as an ‘epidemic’ of cases of contact dermatitis.

Contact dermatitis can cause skin to become red and itchy, and can also cause rashes, scaling, swelling, stinging and blistering. Eczema is the most common type of contact dermatitis, affecting one in twelve adults and one in five children.

MI is found in many popular brands of moisturisers, sun creams, shampoos and wet wipes.

recent rises on concentrations of methylisothiazolinone in products

In the past, methylisothiazolinone was used in extremely low concentrations of less than 15ppm and mixed with another preservative known as MCI, but in 2005 fears that MCI was causing allergies led manufacturers to start using MI as a single agent. In order to maintain the preservative effect manufacturers increased the concentration of MI up to 100ppm in cosmetic products.

Experts say that since the increase in concentration of MI in products, there has been a serious rise in cases of contact dermatitis. Doctors estimate that one in ten patients they are seeing with eczema or dermatitis has been caused by an allergy to the preservative MI.

Methylisothiazolinone was named as ‘contact allergen of the year’ in 2013 by the American Contact Dermatitis Society.

why methylisothiazolinone causes an allergic reaction

The preservative stops products growing mould by binding microbes and preventing bugs from thriving. The reason this can cause an allergic reaction is that the immune systems of some people can mistakenly identify MI as a threat.

As a result of the reports of allergic reactions, in 2014 the EU Scientific Committee on Consumer Safety issued an opinion stating that MI was no longer considered safe for use in ‘leave-on’ cosmetics (including wet wipes), and should be restricted to 15ppm in ‘rinse-off’ products. However, this opinion has not yet become law and many products on sale in the EU continue to use MI in leave-on products, and in rinse-off products at levels in excess of the 15ppm limit recommended.

Green People is methylisothiazolinone free

Green People has never used MI in any of its products. See organic beauty products now.

For more information or if you have any questions please get in touch by commenting below or emailing

Reply to this post


Search GreenPeople