Teeth whitening is normally safe when monitored; overuse or high concentrations without assistance can aggravate gums
https://privatebin.net/?a5ca91d88c08a82e#2VqWbuHRfqJvSMnVsha3XFRRwxaLm9yzxM52XU3nmC62
Teeth whitening is typically safe when monitored; overuse or high concentrations without assistance can irritate gums and increase level of sensitivity-- follow directions closely.