I’ve been using Crest White Strips for about a week now. I should restate that. I’ve successfully completed approximately 7 days (2x per day) of the Crest White Strip regimen. They were not all back-t0-back, however. I notice that I’ve had a headache on most every day that I’ve used them. Correlation? Maybe. I believe it is because of a very sensitive tooth that I have on the left side of my mouth. Possibly.
I do notice a difference in my teeth. Not dramatic, but definitely a bit brighter.
I have no trouble getting the strips on my teeth, as some reviews I’ve read. I did have one strip that left the gel behind and was rendered useless. Also, when I have the strips in my mouth, I spit. I don’t swallow my saliva for a half hour. Maybe it is weird, but I really don’t want that gunk in my tummy, just as I don’t want toothpaste or mouthwash in there either. I don’t need a whitened tummy.

I just googled white strips and headaches and your site popped up. I have tried using the strips three times and each time I’ve gotten a horrible headache. I called Crest and asked them if that was common. They told me nobody had every reported that symptom?! Weird.
It is weird. I haven’t used them for days because I didn’t want to get a headache again. And I haven’t had any headaches, either. I’m trying to get up the nerve to try again and see if it happens.
I also get headaches using the crest white strips! I googled it, and got your site as well. I think it’s definitely related…
Yes, yes, yes! Me too, and having only noticed an everso slight difference, I figure I’ll just smile less and quit the strips.