Sensitivity and allergies: be careful what you put on your nails!

3 min to read

Unlike many traditional gel polishes, Green Flash contains no HEMA or Di-HEMA TMHDC, two sensitising molecules that can cause skin allergies!

Allergic to gel polish? HEMA and Di-HEMA TMHDC are the guilty parties.

A lot of gel polishes can cause allergies and you may well have paid the price! The culprits? Two little molecules called HEMA and Di-HEMA TMHDC monomers. These substances belong to the chemical family of acrylates and methyl-acrylates, and are used to make many traditional gel nail polishes. When exposed to UV or LED light, they are able to bond to each other to form a large network of polymers, which gives nail polish its staying power.

For six months these two molecules have been in the spotlight, and this type of sensitising gel nail polish is now the subject of a new European regulation* that prohibits its sale to the general public. Unfortunately, these products continue to circulate on the market and are still very easy to obtain, exposing consumers to serious allergy risks.

Reactive molecules that penetrate the skin…

The problem with these so-called "sensitising" substances is that they are chemically very reactive and often cause inflammatory reactions, especially when they come into contact with the skin. In fact, if the coat of gel polish is badly applied and gets on your fingers, these little molecules are able to pass through the skin's superficial top layer or cuticles and reach the epidermis.

Their high chemical reactivity means they can bond to proteins in the epidermis by modifying them. The "modified" proteins in the epidermis are then seen as foreign by your immune system, which creates an allergic-type inflammatory reaction to defend the body.

Once allergic, always allergic?

The thing is, you don't always notice it right away. The sensitisation process often occurs away from the first exposure site, and the immune response is set up and activated at each exposure. But unlike the irritation process, this sensitisation is permanent because your body remembers the immune response and it can happen again, even after a long time, when you are exposed to the same molecule or a similar one.

Many studies and scientific reports** have shown the "sensitising" effects of these molecules on the skin (dermatitis, itching, erythema, flaking skin on the hands) and on the respiratory system (e.g. asthma), as these small molecules are also very volatile and can be inhaled, especially if you're exposed to them daily.

Restrictions and the regulation

To avoid the risks, this type of gel polish must be applied with great care. That's why the new European regulation* prohibits the direct sale of this type of product to individuals and only authorises its conditional sale to nail care professionals, who are encouraged to use protective measures (vacuum table, filter mask and nitrile gloves).

Green Flash: the non-sensitising alternative that doesn't compromise on staying power

At Manucurist, we put health first. Beautiful nails don't come at the cost of your health. Since its launch in 2019, our innovative Green Flash has been ahead of the regulation, offering a new generation of 12-free, non-sensitising gel polish with no HEMA or Di-HEMA TMHDC monomers.

With Green Flash polish, no more nails damaged by gel polish... and no more allergies!
And you're still the ones who talk about it best!

I'm allergic to acrylates and I've had no adverse reaction! At last I can wear gel nail polish. Nathalie B.

I'm really happy! The products are perfect! I was allergic to traditional gel polishes but I've had no problem with these! Laurie E.

I tried so many brands of gel nail polish and they all triggered allergies. Now I'm delighted to have finally found a natural gel polish that lasts! No more allergies and no more damaged nails. Removal is really easy too! I love it and I can't wait to try all the colours! Élise B.