l-carnitine -ai Acetyl L-Carnitine, 60 Vegan Capsules (500 mg per Capsule) L-Carnitine | Linus Pauling Institute
Description
Community-based data from Olmsted County indicate that only 16% of HFpEF patients had a prior myocardial infarction, compared to 28% of those with heart failure with reduced ejection fraction (HFrEF)

The inclusion and exclusion criteria are summarized in Table 1

One could also argue that the source of the caffeine does not matter

195-Platinum nuclear magnetic resonance spectroscopy

& Watzl, B