l carnitine unsafe l-carnitine: Nutrition, pathology, and health benefits Carnitine: Genetic Variants Affecting Mitochondrial
Description
The effect in terms of improving running speed was directly proportional to its anti-oxidative activity (Seifulla 1993)

Chen B, Dowlatshahi D, MacQueen GM, Wang JF, Young LT

It qualifies as a conditionally essential amino due to the bodys ability to burn through L-Carnitine faster than it can produce it, requiring many to have to increase their dietary intake or supplement itespecially in older age when L-Carnitine production decreases

Long-term AAS use has been linked to glomerular hypertrophy and focal segmental glomerulosclerosis, likely secondary to hyperfiltration, systemic hypertension, and dyslipidaemia
Effects of L-carnitine supplementation on markers of exercise-induced muscle damage in healthy adults: A systematic review and meta-analysis of randomized controlled trials
Rajkumar A, et al
