How to Give B12 Injections at Home to Yourself PA Relief Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide VITAMIN B12 (Generic) Injectable Solution, 1000 mcg mL, 100 mL vial Easy Refills Chewy Rx 5 Amino 1MQ 50mg (Nicotinamide N Methyltransferase Inhibitor) BioPeptics Reduced calorie diet combined with NNMT inhibition establishes a distinct microbiome in DIO mice Scientific Reports