l carnitine medicine tablet KAL Acetyl-L-Carnitine and Alpha Lipoic Acid Tablets, 60 ct L-Carnitine / 500 mg with
Description
Study Procedure Subjects were supplemented for 24 weeks with either 1500 mg l-carnitine-l-tartrate or a isonitrogenous placebo per day in a double-blind fashion

The protocol doesnt require adrenal testing

PQQ has been shown to stimulate mitochondrial biogenesis, the process by which new mitochondria are formed in the cell
Some research suggests splitting the dose (e.g., 1,000 mg in the morning with breakfast + 1,000 mg pre-workout) produces better muscle carnitine accumulation than a single large dose

[DOI] [PubMed] [Google Scholar] Gao X., Sun G., Randell E., Tian Y., Zhou H

Two risk factors in this child's history push the decision in favor of ATX: history of seizures in him, and of substance use in his family