Some ingredients are irritants
I was taken back by the scent when I first opened the packet, I found it really strong & when reading the ingredients was surprised to see it had added parfum. Also Levulinic acid (classed as "relatively nontoxic") & Sodium Levulinate which is derived from levulinic acid. The cosmetics database does find this ingredient to be an irritant even at low doses. So depending on your skin sensitivities I would be cautious when using these.