jarrow formulas acetyl l-carnitine ala 100 caps Capsules Neuro Optimizer - Pure Prescriptions
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However, vegans or vegetarians may benefit from a supplement since their diet naturally contains less of the compound, she says

Amino.Acids 2012;42(5):1783-1792

meanwhile, an elevated intensity of PD-1 and a reduced intensity of transcriptional regulator TCF1 was observed on CD8 + T cells ( Figure 4E )

And the answer has a bit of nuance

See Figure 1 for the chemical structures of L-carnitine, acetyl-L-carnitine, and propionyl-L-carnitine
