"Ketone" ... hrmm.. sounds like someone picked up some chemSlang and decided to throw it into their drugSpeak ..
Your friend, as most "knowledgable drug people", is an idiot...
To clairfy ..
Methamphetamine HCl is methamphetamine HCl, however, there are a number of ways you can make it... probably the most common clandestine route is with ephedrine, as you only need to reduce it to meth (reduce = add a hydrogen) .. the end product is D-Meth HCl (the D identifies the Dextro isomer) .. now you can also use other chemicals to make meth, and some of these routes do NOT involved ephedrine - for instance, phenyl-2-propanone and methylamine can yeild meth, however it's not D-Meth, but rather D,L-Meth HCl (the L represents the Levo isomer, which is less-active then the Dextro isomer, this type of meth is half/half, or recemic, and is less potent then straight D-meth) .. you start with a ketone and end up with an amine..
"had to be cut with glucose or could be fatal"
Thats a bucnh of crap!
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