taking a peek

I seem to recall that at the outset we were instructed not to question what toothpaste we were using. We were divided into two groups, both using tubes with non-descript white covering, distinguished only by a different letter. But whether or not we were instructed in that manner, I doubt that anybody really expected us not to take a peek, even when doing so meant rather extensive disfiguring of the covering of the tube.



Half of those of us in the study used Crest, while the other half used something else - I'm not sure, but I think it was a generic fluoride toothpaste developed by Colgate. I was later informed that the research, conducted by Colgate, was instrumental in the development of Colgate Total - a toothpaste I've never tried, and one that I assume is only minimally different from the Crest that, over these last 13 years, has become a habit by me.