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Depending on the severity of your deficiency and the goal of your injections, a doctor will prescribe a schedule to follow to ensure that you are absorbing the appropriate amount of Vitamin B12
When your body does absorb B12, it takes time for the vitamin to be distributed throughout the body and more time for the body to use it in a way that is noticeable
These include: Lifestyle interventions (dietary advice, physical activity programmes) Licensed pharmacotherapy such as orlistat, or GLP-1 receptor agonists including semaglutide 2.4 mg (Wegovy, NICE TA875) or tirzepatide (Zepbound) where clinically indicated and available Referral to tier 3 or tier 4 weight management services , including bariatric surgery assessment where appropriate Information on NHS weight management services and eligibility for licensed treatments is available via the NHS website and NICE guidance
Most people notice a small boost in energy within a few days, but it can take 12 weeks to feel a clear and steady improvement
Knowing How Quickly B12 Shots Work Remember, developing a B12 deficiency can take years
