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The Bottom Line: B12 and Weight Management Currently, scientific evidence supporting B12 shots for weight loss in the absence of deficiency is insufficient

Research shows up to 87.7% of prediabetic patients reverted to normal glucose tolerance with treatment

Repeatedly using the same injection site can lead to skin irritation, tissue damage, and even scar formation

Is GHK-Cu safe

They are not interchangeable with prescription therapy, but they may have a role in a broader mast cell support strategy in selected patients

A suitable oral regimen can replace vitamin B12 for many people, including some people with diet-related deficiency and some people for whom high-dose oral treatment is chosen despite suspected malabsorption