l-carnitine with fucoxanthin benefits Nature's Bounty L-Carnitine, Supports Heart Health & Fat Metabolism, Amino Acid Supplement, 500 mg, 30 Tablets : Everything Else Best Time to Take L-Carnitine:

So whatever condition you had prior or condition

However, three real risks exist: reduced therapeutic effect (dangerous for diabetes management), potential contamination in older opened vials, and possible immunogenic responses from aggregated peptides

Chirality 20 , 519 (2008)

Despite evidence indicating incr levels of free carnitine and carnitine metabolites in the blood and urine following an oral dose, no significant change in RBC carnitine levels was noted in healthy subjects, suggesting either a slow repletion of tissue stores of carnitine following an oral dose or a low capability to transport carnitine into tissues under normal conditions