Acetyl-L-carnitine is a naturally occurring compound that plays an important role in energy production and supports many bodily functions, like cognitive function, weight loss, and heart health
Electrophysiology results Based on a well-known phenomenon in peripheral nerve injury (i.e., as the number of preserved motoneurons decreases, the MUP (giant potential) in the tail muscle increases), it is conceivable that the BPC 157-treated rats that underwent spinal cord injury and were subjected to EMG recordings exhibited a markedly lower MUP in the tail muscle than that in the corresponding controls (Table 3)
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BPC 157 was studied almost exclusively by the same Croatian team that created it, doing rat study after rat study, while MK-677 was the domain of the Merck Research Laboratories in New Jersey, whose scientists conducted multiple small trials in humans in the 1990s, trying to see if the drug had interesting effects on a variety of surrogate markers
Resources and further reading Look for systematic reviews of human trials on L-carnitine, trial reports for the specific carnitine form you are considering, and transparent product research pages such as the Tonum Motus research hub linked above
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