NICE notes that pernicious anaemia is the most common cause of Vitamin B12 deficiency in those aged 40-70, with an average onset age of 60 in white people and 50 in black people, although it can affect black women at a younger age
Some users report mild side effects, including: Temporary redness at the injection site Slight fatigue Digestive discomfort with capsules These effects are usually minimal compared to other performance-enhancing compounds
According to British Society for Haematology (BSH) guidelines and NICE Clinical Knowledge Summaries (CKS), the primary beneficiaries include: Key patient groups who may require B12 injections include: Pernicious anaemia patients requiring lifelong hydroxocobalamin 1mg intramuscularly every 23 months following initial loading doses Patients with gastrointestinal disorders including those who have undergone gastrectomy or ileal resection, and patients with conditions affecting B12 absorption such as Crohn's disease or coeliac disease Strict vegans and vegetarians though oral supplementation is usually sufficient unless malabsorption is present Elderly patients who may have reduced gastric acid production affecting B12 absorption Patients taking certain medications including metformin (MHRA advises monitoring B12 levels in long-term users, particularly those with risk factors or symptoms), proton pump inhibitors, and H2-receptor antagonists long-term [6] Individuals with neurological symptoms such as paraesthesia, ataxia, or cognitive impairment related to B12 deficiency Pregnant women with confirmed deficiency (hydroxocobalamin for malabsorption
The completion rate for patients randomized into the extension phase of Study 2 was 81%
Allergic reactions Rare but may include itching, rash, or difficulty breathin Always consult a healthcare provider if side effects persist or worsen
