propionyl-l-carnitine and l-carnitine Propionyl-L-carnitine-d3 (chloride) (C3:0 Carnitine-d3, CAR 3:0-d3, propionyl ester-d3, Levocarnitine propionate-d3, L-Propionylcarnitine-d3, CAS Number: 1334532-19-2) L-Carnitine Fumarate – Olympian Labs
Description
10.1186/s12986-016-0069-y Nutr Metab

doi: 10.1038/s41467-024-48307-z
Thus, future research could look at a complete system of precise, affordable, and non-invasive biomarkers for early PD

For hair , the same logic applies, more so

C.RochaL

[DOI] [PubMed] [Google Scholar] 235.Schuster G.U., Kenyon N.J., Stephensen C.B
