You are correct, the FDA doesn&#x27;t allow it.<p><i>&quot;1,2,3-methyl dethyl has been proven in clinical research to make your life suck less. (This statement not evaluated by the FDA blah blah blah)&quot;</i><p>I&#x27;m assuming you saw that on a dietary supplement?  That would never fly for an approved drug.  Take a look at the FDA website to see what kind of promotion they crack down on.  There was a ADD drug company that had an ad with a kid studying and the slogan &quot;He can finally get his homework done&quot;.  The FDA came down hard on them and said &quot;where is the clinical trial showing that academic performance improves?&quot;.<p>As other posters have stated, 23&amp;Me got busted, submitted a 510(k) (approval of medical device) and then when the FDA came back with questions, they failed to reply.  You can find it all in the numerous FDA warning letters.[1]<p>[1]<a href="http:&#x2F;&#x2F;www.fda.gov&#x2F;ICECI&#x2F;EnforcementActions&#x2F;WarningLetters&#x2F;2013&#x2F;ucm376296.htm" rel="nofollow">http:&#x2F;&#x2F;www.fda.gov&#x2F;ICECI&#x2F;EnforcementActions&#x2F;WarningLetters&#x2F;2...</a>