Didn't another study show carnitine was good for the heart? Low bioavailability = no meaningful effect, Oral L carnitine has very low bioavailability., Most of it isnt absorbed, and even what is doesnt increase fat burning., ., ., ., ., #workout #malayalam I get a lot of messages from yall asking about vascularity and which supplements to take to get those veins poppin. Truth is, the base of vascularity is low body fat. Once L Carnitine: Benefits, side effects, and dosage