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The UK's teeth-whitening
is regulated. Only
who have registered with the General Dental Council can do it. The BBC went
and unearthed "thousands" of ill-qualified teeth-whitening
. Two researchers paid nearly $400 each to attend a five-hour teeth-whitening
at a London beauty college. The researchers received a
and were told they could earn $100 an
to treat customers. Anyone attending these
and setting up their own businesses are doing so
. They could end up with a criminal
.