nih.gov l carnitine & l tartrate are the same thing Nature's Truth, Capsules, 60ct, Non-GMO, Gluten Free Supplement L-Carnitine Tartrate 4Endurance: Your Natural
Description
With only 3 mg of caffeine per capsule, this formula delivers clean energy without overstimulation, making it suitable for those sensitive to stimulants or seeking a supplement that can be taken at any time of day

Gut Microbes

The intravenous LD 50of levocarnitine in rats is 5.4 g/kg and the oral LD 50of levocarnitine in mice is 19.2 g/kg

What is the difference between carnitine and acetyl L carnitine

That very smart I didnt think of that, thank you