Many dentists have been surprised by recent media claims of periodonta
l benefits with a purportedly revolutionary dietary supplement. The re
search literature on coenzyme Q10's periodontal effects does not exten
d to the international English language dental literature, which perha
ps explains the surprise. A review of the available literature does no
t give any ground for the claims made, and selected papers are discuss
ed to show that there is actually some evidence that coenzyme Q10 has
no place in periodontal treatment.