TPO Ban in Nail Products: What You Need to Know
From 1 September 2025, the EU will ban the use of TPO (trimethylbenzoyl diphenylphosphine oxide) in cosmetic products, with Great Britain expected to follow in 2027. While this may sound concerning, the decision to implement a TPO ban is based on extreme caution rather than evidence that current nail products containing TPO are unsafe.
What is TPO?
TPO is a photoinitiator, which is a type of chemical that helps gel nail polish harden under UV or LED light. Without photoinitiators, gel manicures wouldn’t cure properly, so they are an essential part of the formula.
Why has TPO been banned?
TPO has been classified under chemicals safety law as potentially “harmful to reproduction.” In toxicology, this classification refers to the possibility that a substance could affect fertility or development if someone were exposed to very high amounts. It is important to stress that this does not reflect the very small levels used in nail products, or the way they are applied. Many brands like OPI, have already announced or introduced TPO-free ranges, and I expect many more to follow suit.
What about skin reactions?
For most people, the main risk from gel nail products is not from TPO itself, but from contact dermatitis, an allergic skin reaction that can occur if uncured product touches the skin. This is one reason why professional application is recommended, as trained technicians are less likely to allow uncured gel to make contact with surrounding skin.
TPO Ban 101
Are products with TPO safe to use now?
Yes. Products currently available have passed rigorous safety checks! It’s worth noting that the studies used to classify TPO as “harmful to reproduction” were carried out in animals, where the ingredient was given orally in very high doses. This method of testing helps scientists understand the absolute worst-case scenario, but it does not reflect how TPO is used in people. In nail products, TPO is applied in tiny amounts directly to the nail plate and cured under light, which means there is minimal chance of it entering the body in the same way.
What will replace TPO in nail products?
Brands are already reformulating with alternative photoinitiators, ensuring continued performance and compliance.
Do consumers need to do anything now?
No immediate action is required. Products containing it are still considered safe under current cosmetic regulations and remain legally on sale until the TPO ban takes effect.
That said, if you would like to take a more cautious approach, you can:
Check ingredient lists: Some brands now highlight when their gels are “TPO-free.” Bio Sculpture is a good option.
Choose reformulated lines: Major brands like OPI and CND are already moving away from TPO.
Prioritise safe application: The bigger risk with nail products is skin contact leading to contact dermatitis. Using professional application and avoiding DIY exposure can help reduce this.
