Above before, below after 5 days of treatment. (8 minutes x 4 every day). I took these photos in the same spot in my bathroom with the same lighting. I have used whitening gels and trays before and my teeth are not as sensitive as with other products. Also in the properties of the product it is indicated that 1 "tube" of gel is enough for 4 procedures. Well I got 8 treatments from each tube. Needless to say, there is plenty of extra gel.
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