acetyl l carnitine stink O-Acetyl- -carnitine analytical standard 5080-50-2 O-Acetyl-L-carnitine hydrochloride – Chem-Impex

They specifically cited Armour Thyroid, NP Thyroid, and Nature-Throid, among others

There is no right or wrong here so just experiment.

Inhibition of fatty acid oxidation by etomoxir impairs NADPH production and increases reactive oxygen species resulting in ATP depletion and cell death in human glioblastoma cells

Furthermore, these biological effects were accompanied with LC administration by a reduction in muscle wasting induced by tumor and a betterment in physical performance as measured by locomotor movements, stereotyped movements, and total physical activity during 21 h, mean velocity, and total distance travelled (Busquets et al., 2012)

METALLURGY C07ORGANIC CHEMISTRY C07CACYCLIC OR CARBOCYCLIC COMPOUNDS C07C53/00Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen C07C53/124Acids containing four carbon atoms Definitions L-( )-Carnitine is a vitamin-like nutrient that is essential for energy production and fat metabolism in the physiological systems of birds, fish, and mammals