The following table gives an overview of all of those currently under investigation: Vitamin B12 One Vitamin, Many Effects Not all forms of vitamin B12 are the same
People with pernicious anemia, or those at risk of developing it
The Quick and Simple Injection Process Getting your B12 injection is one of the fastest treatments available
Quality and COA verification
MHRA Borderline Guidance MHRA guidance updated on 2 July 2026 explains that classification can consider pharmacological properties, explicit and implied claims, intended purpose, packaging, websites, social-media content and customer reviews
Strongest human evidence The METAOD006 (OPTIONS) Phase 2b trial randomized 502 adults with obesity (BMI 30-45 kg/m^2) to oral AOD-9604 (0.25, 0.5, or 1 mg/day) or placebo for 24 weeks alongside a supervised diet and exercise program