l-carnitine as a supplement 500 mg Capsules L-Carnitine - Self Omninutrition

Zepnik H, Vlkel W, Dekant W (2003) Toxicokinetics of the mycotoxin ochratoxin A in F 344 rats after oral administration

Food Additives and Contaminants, 2005, 22(4): 369-378.,RochaO, Doohan FMAnsariK 162

Clinical injectable protocols delivered at a medical clinic use higher concentrations, prescription compounds, and direct delivery to the follicle area or systemic bloodstream, producing stronger and more measurable outcomes

Obviously, these are tendencies, not rules

Take, for example a study published in Biogerontology in 2003

Dietary Quercetin Alleviated DSS-induced Colitis in Mice Through Several Possible Pathways by Transcriptome Analysis