how inject my self vitamin b12 to Self-Inject at Home B12 Shots at Home: How,
Description
B12 deficiency symptoms include chronic diarrhea, lethargy, weight loss, and neurological issues

2.5 mg = 20 units and 5 mg = 40 units on a U-100 syringe
You may already have heard of B12, since its an essential nutrient for humans, too
Adults aged 15 and over in the UK require 1.5 micrograms (mcg) of vitamin B12 per day, according to the Reference Nutrient Intake

New England Journal of Medicine 2006;355:20910

Give the patient a drink with a radioactively labeled B12
