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Hi Rkocz,

Thanks for the correction. You are right that that is half a teaspoon. I've corrected the original post.

Dr. Vilain says that when he conducted the research, he did not intend for it to be used in a "CSI" setting, so he did not think to determine the smallest amount of saliva necessary to determine age. However, he did say, "I see no theoretical reason for why we couldn't do this on traces of saliva. But that remains to be verified experimentally."

And by the way, he did not conduct his research in the U.S. system; he used the metric system as you guessed.

Thanks again.
Laura