inject b12 Best Vitamin Injection Site: Administering B12 Shots Buy B12 Shots and Injections

NUTRITION 6-MIN READ UPDATED MAY 2026 Vitamin B12 After Bariatric Surgery: Why It Matters and How to Stay Above the Risk Line B12 deficiency is the most under-diagnosed long-term complication of bariatric surgery

Injections are more effective for those with absorption issues or severe deficiency, but oral supplements work well for most people with mild deficiency and normal absorption

However, older adults and those who do not get adequate amounts of this nutrient (2.4 micrograms for adults) from food, such as vegans and vegetarians, are advised to take vitamin B12 supplements

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