optovite b12 injections 1000mcg (Cyanocobalamin) – e-prescription in Spain Vitamin B12 Injection – Skin
Description
How to inject b12 will depend on which you choose

Patients should be aware that heavy, chronic ethanol use may counteract the therapeutic effects of vitamin B12

According to a study by Obeid et al., a widely accepted expert consensus on diagnosing and treating vitamin B12 deficiency, recognized that untreated deficiency can lead to irreversible symptoms

1996 May;53(5):441-8

1997 Apr;19(3):201-10