Scientists say people in China should not wear facial sheet masks for more than 20 minutes at a time, claiming that their insights provide the first ‘realistic risk assessment’ of such products among the local population.
Writing in the journal Scientific Reports, they detailed how they sought to assess the length of time for which facial sheet masks should be used.
They recruited 175 healthy people aged 18 years or older and divided them into two subgroups. The first group of 35 people was asked to apply the same mask for 5, 10, 15, 20, 25, and 30 minutes respectively.
Meanwhile, the other 140 subjects were instructed to apply one of four types of facial sheet masks on the market for 15 minutes.
They then tested for the levels of phenoxyethanol and methylparaben on the face.
By Gary Scattergood – 09-Feb-2022
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