Frontiers Adipose tissue dysfunction disrupts metabolic homeostasis: mechanisms linking fat dysregulation to disease Where to Inject L Carnitine for Maximum Fat Loss Benefits Routes of Drug Administration Springer Nature Link Obese Ningxiang pig derived microbiota rewires carnitine metabolism to promote muscle fatty acid deposition in lean DLY pigs: The Innovation Intramuscular, subcutaneous, and intravenous injections explained