Methylcobalamin and adenosylcobalamin are already in active forms, which some practitioners prefer for people with genetic variations that affect B12 metabolism
If prescribed, your healthcare provider will determine your dosage and schedule based on your clinical needs
Loprinzi CL, Lacchetti C, Bleeker J, et al
Carnitine TABS contains 2,000 mg of the fat burner l-carnitine tartrate, which is a specific form where carnitine is bound to tartaric acid (tartrate)
So if youre looking into L-carnitine to help with a medical condition, check with them first
Ojima F, Sakamoto H, Ishiguro Y, Terao J