is l carnitine natty Injectable l-carnitine has 100% bioavailability and it's a supplement, not steroid. Even as a you can use and it can also help you in your bulking process, not just in fat L-Carnitine 1500 Rapid Heat -

Neutralization of interleukin-9 ameliorates symptoms of allergic rhinitis by reducing Th2, Th9, and Th17 responses and increasing the Treg response in a murine model

Karamali M, Ashrafi M, Razavi M, Jamilian M, Akbari M, Asemi Z

Glutathione deficiency may promote cancer initiation (by failing to protect DNA from oxidative damage), while elevated glutathione in established tumors may promote cancer progression and treatment resistance (by protecting cancer cells from chemotherapy and radiation) [2][5]

Both raise your B12 the difference is how much actually gets in

Intake levels vary across the world owing largely to differences in soil content and factors affecting its bioavailability to plants