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b12 injections and chronic fatigue Vitamin Injection | Causes of Energy Support Updated Booklet: Vitamin B12 &
Description
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Cohort 1 (active from June 2025) covers adults with a BMI of 40 or higher and at least four weight-related conditions

People with certain medical conditions, known allergies to B12 or cobalt, or those taking specific medications should consult with their doctor first

Here's which fits
Vitamin B12 deficiency is one of those