man i was literally just looking at those bulk powders today and wondering the same thing lol. the price difference is insane compared to what those clinics charge but i’m always a little sketched out about the purity when it's just a big bag of powder vs the tiny freeze dried vials. following this to see if anyone has actually tried it without getting a crazy injection site reaction!

i wouldn't mess with the bulk supplements stuff for pinning honestly. that grade is usually meant to be dumped in a smoothie or put in capsules- its not usually sterile or filtered enough to go straight into your muscle. you might end up with a nasty abscess or a fever if there’s even a tiny bit of impurities in there. glutathione is one thing but nad+ is finicky as hell.

pretty sure the molecule is the same but the way it's processed is the big deal. the stuff in the vials is specifically made to be stable once you add the bac water. i’ve heard nad+ degrades super fast so if you mix up a big batch from a bulk bag it might be useless in like 3 days lol. definitely would need a ph strip to make sure you aren't injecting acid into your arm too.

honestly dude just pay the extra for the lyophilized stuff from a legit pep site. it’s way less of a headache than trying to play chemist with a scale and coffee filters in your kitchen lol. i diy my carnitine and even that is a pain in the ass to get right sometimes.

i think the ph is the big killer here. i tried a home brew solution once and it stung like a motherfucker- felt like i was injecting straight lemon juice lol. if you do try it definitely get some sodium bicarbonate or something to buffer it because nad+ is naturally really acidic when it dissolves. stay safe man!