It is a fat-soluble compound that can span the entire cell membrane
A., & Greenhaff, P
Expanding fitness participation and endurance sports adoption strengthen the citrulline segment, as nitric-oxide-mediated vascular flow and muscle-recovery benefits gain recognition among recreational athletes
James J DiNicolantonio, Carl J Lavie, Hassan Fares, Arthur R Menezes, James H O'Keefe, 2013 Apr 15 - The Effect of L-Carnitine on Critical Illnesses Such as Traumatic Brain Injury (TBI), Acute Kidney Injury (AKI), and Hyperammonemia (HA)
This distinction matters clinically because it determines dosing, timing, and what results to expect at each stage of the protocol
Though chlorella is slightly higher in some nutrients, you cant go wrong with either.