Vitamin B12 supplements can help treat or prevent a vitamin B12 deficiency, which can be serious and Not everyone needs to take a vitamin B12 supplement, as However, healthcare professionals may recommend vitamin B12 supplements for certain populations, including: people following a vegan diet older adults people who have had gastrointestinal surgery people who have nutrient absorption issues people with dietary restrictions People taking certain long-term medications, such as metformin and proton pump inhibitors, may also benefit from a supplement, as these medications can affect absorption of vitamin B12
Regarding weight management , NHS guidance is unequivocal: B12 supplementation is not recommended as a weight loss intervention
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"Today's announcement builds upon our historic Most Favored Nations drug pricing deals' goal of democratizing access to weight-loss medication, which has been out of reach for so many in need," CMS Administrator Mehmet Oz, MD, said in a statement in December 2025
