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Getting advice from a healthcare pro is vital for a tailored plan

Civil Engineering, UCLA Last updated: June 2026 Human-researched and AI-assisted with full editorial review

With the right support and knowledge, you can take control of your B12 care and keep your body fueled with this essential vitamin

These shots can start to work right away

Gallbladder issues: If you have a history of gallstones or cholecystitis (inflammation of the gall bladder), inform your doctor

B12 supports metabolism and helps convert fat and carbohydrates into energy, making it easier to lose weight when combined with healthy eating and exercise