How to Self Administer Subcutaneous & Intramuscular Injections L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you Where to Inject L Carnitine for Maximum Fat Loss Benefits Issue 13: IMCAS 2025 RESEARCH POSTER: L Carnitine Subcutaneous Injection After HIFU for Local Fat Reduction: a Case Study Suisselle How To Give A Subcutaneous Injection And Sites The HCG Institute