propionyl-l-carnitine hydrochloride VitaMonk GPLC - Glycine with No Artificial Fillers | Glycine propionyl l carnitine 1000mg - supports healthy blood flow - l carnitine supplement most products are formulated for 24 months from the date of manufacture Propionyl-L-carnitine HCl | 119793-66-7

Half-life also differs

They serve different roles

In hemodialysis patients, due to reduced renal clearance, carnitine depletion and acylcarnitine accumulation become significant, resulting in an abnormal increase in the ratio of acylcarnitine to free carnitine in plasma, which in turn inhibits cardiac fatty acid metabolism [261]

It also helps regulate sebum production and diminishes the appearance of fine lines and uneven texture

Pedrera, L

Liu T, Chen JA, Wang W, Simon M, Wu F, Hu W, Chen JB, Zheng H (2014) A combined proteomic and transcriptomic analysis on sulfur metabolism pathways of Arabidopsis thaliana under simulated acid rain