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A comment on Show HN: I invented a caffeinated toothpaste. Parent comment

Re:Show HN: I invented a caffeinated toothpaste by riboflava on Thursday September 15, 2016 @06:56PM (#12510550)
Placebo effect.
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Re:Show HN: I invented a caffeinated toothpaste by eric_h on Thursday September 15, 2016 @07:32PM (#12510740)
I disagree - psychoactive substances applied to the gum are absorbed into the blood steam much more rapidly than those ingested.
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