l-carnitine content in beef steak mg per 100g What is the Best For the Carnivore Diet? users express frustration with the packaging L-Carnitine Makes Steak Unhealthy -

For treating or preventing a B12 deficiency, both injections and oral supplements are available, with the best option depending on your health needs

SUSTAINED ENERGY & VITALITY SUPPORT: Experience consistent daily energy and cardiovascular function without the jitters of caffeine

Proceedings of the National Academy of Sciences, USA 114, 84148419

Note that although L-Carnitine is often marketed as a fat burner, it does not appear to have any real benefit for aiding in weight loss

Ozrio, O

High NNMT expression is closely associated with glucose dysregulation: excessive NNMT activation disrupts nicotinamide metabolism, lowers NAD+ levels, impairs insulin signaling, reduces cellular glucose uptake and utilization, and promotes hyperglycemia and insulin resistance