l carnitine at bedtime When to Take L-Carnitine Acetyl-L-Carnitine
Description
C.BenaliK.LandeauB.et al (1998)

The injection is administered by a qualified healthcare professional and is especially beneficial for patients who cannot absorb vitamin B12 adequately from the digestive tract

Doctors might change this based on how well the patient is doing
doi: 10.1038/ng1767, PMID: [DOI] [PubMed] [Google Scholar] 19.Irvine AD, McLean WHI, Leung DYM