A consumer group called Which? Tested 11 slime products and found that eight of them had more boron than recommended and could cause harm to children playing with it.
If exposed to extensive amounts of boron, one could suffer stomach cramps, irritation, diarrhea, and vomiting. Even scarier, very high levels of boron exposure could even harm unborn children and cause infertility.
According to the European Union, slime should contain no more than 300 mg/kg of boron, slime bought through Amazon had four times the permitted level of boron, having as much as 1400 mg/kg of boron in the toys.
Amazon has since removed the toys that didn’t meet the requirements from its sites and in a statement says,
“All Marketplace sellers must follow our selling guidelines and those who don’t will be subject to action including potential removal of their account.”