Oral L-carnitine has about 10-15% bioavailability, requiring a 10x higher dose compared to injection to achieve similar outcomes.

“It's not very bioavailable if you take it. A lot of people take L-carnitine, L-tartrate, or a acetyl-L-carnitine, and that's about 10% bioavailable.”

“So if you want 1 gram or 1,000 milligrams of L-carnitine, you can take 10 grams of oral L-carnitine.”

“If you ingest it orally, then it has a very low bioavailability-- maybe only 10%.”

“the reason people inject it is typically because the oral format is only about 10 to 15% bioavailable so you have to take literally 10x the dose to achieve the same yield outcome”