Pay in 4 interest-free payments of $7.18 Learn more
Ships within 48 hours · Estimated delivery Sep 1 - Sep 6
An antagonist is an agent that blocks the effect of another substance
Intranasal treatment (via a nasal spray) of B12 is also available through a prescription (Andrs, 2018)
Product identification and total milligram specifications are located solely on the outer packaging
The goal is medical replacement when deficiency is documented or strongly suspected
Last clinically reviewed: 31 July 2026 Clinical information sources NICE NG239 Vitamin B12 deficiency in over 16s: diagnosis and management NHS Vitamin B12 or folate deficiency anaemia NHS Diagnosis NHS Treatment MHRA Vitamin B12 and cobalt allergy advice This page provides general information about the pharmacy service and does not replace personalised advice from a pharmacist, GP or other healthcare professional
