Mitochondria are the tiny "power plants" inside almost every cell, generating the energy your body needs to function. Supporting them is crucial for everything from brain function to athletic performance. Nutrients like Mitochondrial control of fuel switching via carnitine biosynthesis Science Medium chain fatty acid oxidation is independent of l carnitine in liver and kidney but not in heart and skeletal muscle American Journal of Physiology Gastrointestinal and Liver Physiology American Physiological Society Acetyl L Carnitine 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