can you have too much vitamin b12 injection B12: Risks, Symptoms and When to Seek Help – Bolt Pharmacy How Long Does It Take
Description
And there are weight loss and mental health benefits, too

Frank, S.J., et al

What Happens After Your First B12 Injection Following your first B12 injection, several physiological processes begin immediately, though you may not feel different straight away
S.PallesenS

By reducing SAM consumption through NNMT inhibition, 5-Amino-1MQ helps preserve methylation capacity for other critical cellular processes, including DNA and histone methylation (epigenetic regulation), neurotransmitter synthesis, and phospholipid metabolism