l-carnitin wirkung herz & Muskelfunktion L-Carnitin Liquid - Cherry Magness

In addition to a carrier function, it may be that the non-enzymatic binding of molecules prevents their oxidative damage, thus ensuring a protective effect (Mueller et al., 2000)

Support for Weight Loss and Healthier Lipid Levels When paired with lifestyle changes, L-Carnitine supplementation may help reduce body weight and lower body mass index (BMI)

Rodents metabolize caffeine at a rate 23 times higher than humans, and the distribution of caffeine and its metabolites between plasma and brain differs markedly, with humans exhibiting a 10-fold difference compared to 46-fold differences in rats [163]

Arzneimittelforschung 33, 10161018

So that's what they did