I've been curious about the effects of each carnitine versus the others since I started taking them. They are very interesting with a host of beneficial effects supported by the scientific literature. I found a thread on here that gave a one sentence synopsis of the major ones, but I'd like to see more comparative feedback.
I take Arginocarn (Primordial's bulk bags) daily lately. I took a break briefly for no specific reason, but it's funny you mention breaks. Do you think a break is needed when using a carnitine product long term, or switch to a different carnitine, etc?
Some of what I read (abstracts) indicates that the ALCAR has an accumulation type effect, (esp. with treatment of peripheral neuropathy, promoting nerve regeneration, etc), and that could make a case for taking them regularly, depending on why you take them of course.
OTOH, I've read (not in a PubMed article) that ArginoCarn potentiates amphetamine but also increases tolerance to it, so if you take amphetamine regularly (and/or -possibly- some of the amphetamine-like stims like 1,3 dimethylamylamine, sulbutiamine, etc), then periodic breaks might make sense. Definitely more sense than increasing the dose of the stimulant if what I read is actually true. I don't have any studies available to back up that claim that I came across (it just sounded credible in context). I take d-amphetamine daily, and I do notice that ArginoCarn seems to potentiate it, probably via increased monoaminergic activity. The only mechanism I could see for tolerance here would be downregulation of monoaminergic receptors, but again, I haven't seen any studies which suggest that this occurs.
LCLT looks interesting too; how does it compare to ALCAR and ArginoCarn? Or does it better compare to PLCAR and GPLC?
Last, which is your favorite aminocarnitine?