I recommend 35%CP for you, but it depends on the sensitivity of the individual’s teeth. Some people have sensitive teeth and can’t use high concentration.
I recommend 35% CP for you, but depending on the sensitivity of personal teeth, some people's teeth are sensitive, can not use high concentration, some people's teeth are not sensitive, there is no problem
I recommend 35% CP for you, but it depends on the sensitivity of individual teeth. Some people have sensitive teeth and can't use high concentration, while others are not sensitive, so there is no problem