How Long Does It Take to Recover from Vitamin B12 Deficiency? Feeling run down from stressful work periods or just exhausted this winter? A Vitamin B12 injection could be the boost your body's been craving. In just 10 minutes, you can experience an B12 Injection Dosage and Frequency: 7 Essential Guidelines for Adults Liv Hospital VITAMIN B12 INJECTION CLINIC, MONDAY 25th FEBRUARY!! So pleased to be hosting a clinic from the fab B12, who are coming to offer Vitamin B12 injections on Monday the 25th