The study, which was published in the journal Environmental International, evaluated 24 female participants for signs of chemical toxins. Results showed that all of the participants had the chemical triphenyl phosphate (TPHP) in their body within 10 hours of applying the nail polish. This was based on the observed seven-fold increase in the TPHP metabolite known as diphenyl phosphate (DPHP).
The Environmental Working Group estimates that more than 1,500 nail products containinh TPHP are on currently on the market. This is very alarming since the chemical has been shown to act as an endocrine disruptor and has been associated with reproductive and developmental problems in animal models. Moreover, TPHP, which is also used in the production of plastics and as a fire retardant, can contribute to weight gain and obesity.
Although most nail polish brands have their ingredients listed on the bottle, not all of them are completely honest with the information that they disclose. Because of this, the researchers also determined the TPHP content of 10 polishes. The results showed that there were eight polishes that contained the hormone-disrupting toxin. Of these, two did not include TPHP in their ingredients list.
According to the researchers, many nail polish manufacturers are now using TPHP as a replacement for phthalates, which has endocrine-disrupting properties and is toxic, especially to the reproductive system. However, the amount of evidence showing that TPHP also interferes with hormone production, metabolism, reproduction, and development suggests that it is not a better alternative.
Overall, the results of this study revealed that nail polish contains a hormone-disrupting chemical called TPHP that is rapidly absorbed by the body. Exposure to this chemical can lead to problems with metabolism, reproduction, and development. (Related: Nail polish users exposed to chemical linked to paralysis, reproductive disorders, study finds.)
When purchasing nail polish, check its ingredients list first and make sure that it doesn't contain any of the following toxic chemicals:
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