l carnitine weight loss side effects of l-carnitine supplementation on and body composition: A systematic review and meta-analysis of 37 randomized controlled clinical trials with dose-response analysis Can L-Carnitine Cause Side Effects?

Comes from Plants in South America

High plasma and tissue choline concentrations are common in diseases characterized by chronic low-grade inflammation, supporting the role of choline in modulating immune cell activation and tissue damage (176182)

The most commonly reported side effects are typically mild and transient, occasionally including minor gastrointestinal upset, nausea, or heartburn, particularly if the supplements are taken on an empty stomach or in excessively high doses all at once

FAD also underpins fatty-acid -oxidation, amino-acid deamination, and purine catabolism, all of which are energetically demanding in the brain (61)