What is TPO? ‘Reproductive toxicant’ being completely banned in gel nail polishes this August

NAIL technicians in the UK will no longer be able to use varnishes containing TPO starting from this August following a ban on the use of ingredient. Trimethylbenzoyl Diphenylphosphine Oxide (TPO) is the chemical that allows gel nail polish to cure under a UV light lamp, making it go hard and glossy. The chemical allows gel to cure and makes it go hard and glossy Credit: Getty But studies have now suggested the chemical could be damaging to reproductive health and could be linked to long-term fertility issues. From September last year, sales and use of the chemical have been banned in the EU, after it was classed as a “reproductive toxin”. Sign up for the Health newsletter Thank you! Caroline Rainsford, director of science at The Cosmetic Toiletry & Perfumery Association (CTPA), gave this explanation as to why it has been banned. “TPO has been banned in cosmetic products is based on its hazardous properties, meaning how a substance might behave under a ‘worst-case’ situation, when our bodies are exposed to a very large amount.” Industry experts have also explained the decision was based on “extreme caution” rather than evidence of actual harm. Regardless, manufacturers must not place any products containing TPO on the market in the UK from August 15. Nail technicians in the UK will not be able to purchase products containing TPO after 14 February 2027, but they can still use any products they have already purchased after this date. Retailers also won’t be able to sell any home gel manicure kits that contain the ingredient. Most read in Health Those worried about how it may affect their next trip to the salon will also be pleased to hear that manufacturers have reformulated gels. They can now include alternatives like TPO-L or BAPO, which provide similar cure times and a glossy finish. If you are heading to the salon you should also ensure you wear sun cream on your hands if you are placing them under UV lamps. Comment now