the real meth will give you instant euphpria and energy. PERIOD.
I think it's a bit of a stretch to say it's a surefire thing that meth will produce euphoria. In most cases it will, but there comes a point where your body can't keep up with your mind eventually. By day 3 of staying up not eating anything the next 50g of meth won't be anywhere near as pleasing as the first 50mg.
The thought experiment I always use is, imagine you were having a truly miserable day, you got robbed, your girlfriend left you for your ugly cousin, your father died, you're a barely functional homeless polydrug addict doing grimy shit all day, alone, trusting nobody. Doing some meth might pick you up but I would expect a predisposition for a bad time.
In contrast, if you are living the high life, have a secure future, you're well fed and rested, in an environment with some close friends, music, a properly selected dose, etc. it would be very unusual to have a bad time,
It is curious to note that I only ever hear long-term meth users complain about product quality these days. Usually some prodding questions reveal that they still experience the usual physical effects from meth use though - a dose will raise their HR/BP/body temp etc, but they don't feel euphoric, more often paranoid and craving more meth.
I'm pretty sure this stuff has PCP in it having had expereince with it in the past.
You would absolutely know if your meth had PCP in it. The average person given 10-20mg of PCP will be totally zonked. (also pcp is much more expensive, and also a bad combo with meth... erratic behaviour + strange thought processes + paranoia/adrenaline + hypervigilance = bad shit. Like, fighting with cops type shit.
I heard Afghanistan has been using plant based Epheda methods.. That sounds nice.
I would expect most D-methamphetamine to come from ephedrine alkaloids. Usually it's synthetic pseudoephedrne from L-PAC and not the natural product though. Extracting
Ephedra spp. is simply not cost effective in comparison. It's not like meth is hard to make, it's a one step reduction after all, been done for over 100 years now.
Also, re: isopropylbenzylamine, at least where I live (Vancouver) there is enough meth around that competition drives out the shit product. Sure you could cut your shit, bur when the other 3 guys on the block have pure shit, you just lose clientele. I don't claim to have tested all the meth availiable here but when I was GCMSing stuff I rarely if ever saw meth cut with anything, and never N-Iso.