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Why didn't he mention all that other "stuff" though?
Each is merely a different salt rendering some of the specific concentration of the carnitine part useless. The studies that are out there on all the varying salts were paid for by the people that put the salts out. Why is this important? Because the "arginate" portion for instance of so-called Glycocarn was only done so to create a new patent. To suggest its superiority would require an independent on propionyl-L-carnitine vs. propionyl-L-carnitine-arginate...the same could be said for ALCAR and ALCAR-L-arginate, so on...
Sigma-tau is merely using the same schemes as the pharmaceutical industry in their classification. Its actually mildly disheartening, albeit not-surprising. Besides studies suggested these were actually inferior...why? Because when you start putting on other molecules and still only supply 1 gram, your total concentration of the carnitine part goes down. Same story.
We can assume:
ALCAR - crosses blood brain barrier, concentrates in brain - though we also know of other properties like upregulation of testosterone receptors...so what would that mean? Well, the only similarity between ALCAR and LCLT is the "L-carnitine" - not surprising, but you can't patent it, so people will suggest basic form to be relatively useless. YAWN.
PLC - concentrates in cardiac tissue, again study suggests 1 gram PLC + 1 gram ALCAR + 1 gram of L-carnitine all contributed to increasing T-receptors. Common bond? Yup! The "L-carnitine."
What's the other common bond? A supplement industry as shady as pharmaceutical one. Who do you believe???
D_
Does the above mean that L-carnitine will give the same results as alcar and the rest of the various carnitine forms??