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So, what then causes low vitamin B12
Your body doesnt naturally make B12, so you get it from eating animal byproducts, or supplementing
For the full breakdown of the research, see our guide on whether B12 injections work for weight loss
Selectivity does not necessarily mean reduced effectiveness for fat loss
Injection site reaction Some redness, itching, or mild swelling at the injection site is normal and usually fades within a few hours
