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giving a b12 injection in the arm Shots at Home: How, Where & How Often to Inject Yourself B12 Injections| Norfolk, VA |
Description
It is given concurrently

This causes fat cells to die from lack of blood supply rather than from metabolic changes

Current evidence does not support the use of B12 as a weight loss intervention, and B12 products have no licensed indication for weight loss in the UK

Kreitschmann-Andermahr I, Suarez P, Jennings R, Evers N, Brabant G

This takes less than 30 seconds and could save you from injecting a compromised medication
Of course, there are other contributing factors to obesity in these studies
