Enhanced Bioavailability of L Carnitine After Painless Intradermal Delivery vs. Oral Administration in Rats Pharmaceutical Research Springer Nature Link Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota PDF) Enhanced Bioavailability of L Carnitine After Painless Intradermal Delivery vs. Oral Administration in Rats ORAL VS. INJECTABLE L CARNITINE , Does it really matter which you use? , Both have pros and cons but it really comes down to what is going to be most suited to use as an individual athlete., 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 Injectable VS Liquid L Carnitine. Which is better? YouTube