Works excellent, less painful then others, suitable for kids (check right percentage and age). Reliable seller (ordering for years from him)
I've been using/ordering this for years (from "biscuits4shmuel" - not using it every day of course !). PHILIPS is suitable for kids as well, instructions say from 12 years and on, just read instructions to see the right model /percentage/. It has fluorides and potassium to reduce hypersensitivity,
I also use "OPALESCENCE" for myself from the same seller, it's bit faster than PHILIPS, but for kids I go with PHILIPS.
Both products are excellent, I think best on the market, seller sells fresh products. I advice, keep in the fridge so product doesn't expire at all.
Good luck,
P.
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