Acetyl L Carnitine Vitamin Supplement for Neurological Health 3 Reasons Acetyl L Carnitine Supports Cognitive Health HealthyHey If fatigue, brain fog, or crashes make everything feel harder, strengthening the basics can make a real difference. Supporting mitochondrial function is a core piece of many Long COVID and ME CFS treatment Carnitine and acetyl L carnitine Neuroneeds Potsie here! L Carnitine supplementation has helped me get through the day without brain fog and fatigue.