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QUESTION See Answer Harvard School of Public Health: "Vitamin B12." John Hopkins Medicine: "Vitamin B12 Deficiency Anemia." Mayo Clinic: "Weight loss." Nutrients: "Vitamin B12 in Health and Disease." Tennessee Medicine: "Vitamin B12 deficiency and severe weight loss in an elderly patient." World Journal of Diabetes: "Excess vitamin intake: An unrecognized risk factor for obesity." Top Will Vitamin B12 Deficiency Cause Weight Gain Loss Related Articles Can Vitamin B12 Reverse Premature Gray Hair?If vitamin B12 deficiency is the cause of premature graying, then it can be reversed with vitamin B12 supplementation

How This Works GHK-Cu is a naturally occurring tripeptide that complexes with copper ions to modulate numerous biological processes

While B12 is naturally found in animal-based foods, some individuals may struggle to absorb enough of it through their diet alone

Unlike others, the absorption of vitamin B12 depends on a protein called intrinsic factor, which is produced in the stomach

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