l carnitine v shreded L-Carnitine vs Fat Burner MusclePharm L-Carnitine 3000 by MusclePharm:

In contrast, when the concentration of carnitine in the plasma increases and the filtration load of carnitine increases, the kidney rapidly increases the rate of carnitine excretion and reduces its reabsorption efficiency to prevent the excessive accumulation of carnitine in the body

Handheld dynamometry (HHD) has been studied and consists of the evaluator applying confrontational resistance to prespecified muscle groups, measuring outputs against healthy population Z -scores and combining Z -scores into cumulative scores for an extremity

Arq Bras.Endocrinol.Metabol

Diagnosis can be made with a combination of studies (send out labs for most folks): plasma free & total carnitine, plasma amino acids, urine orotic acid, plasma acylcarnitines, urine organic acids, comprehensive metabolic panel, creatinine kinase, and a lactate level

DambrovaMMakrecka-KukaMKukaJVilskerstsRNordbergDAttwoodMMet al