I'm a fan of creatine. From the research that I read, even though there's still lots more to learn, it is one of the best studied molecules in terms of what it PDF) Comparison of pharmacokinetics of L carnitine, Acetyl L carnitine and Propionyl Lcarnitine after single oral administration of L carnitine in healthy volunteers Carnitine and Acylcarnitine Analysis Service LCMS MS Quantification Creative Proteomics 3 Reasons Acetyl L Carnitine Supports Cognitive Health HealthyHey