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Journal of Applied Physiology, 110(3), 774-780

It is recommended that adults over the age of 50 increase their sources of vitamin B12 through diet, fortified foods, B12 shots, or other supplements that can increase their B12 consumption. (By The National Institutes of Health) GASTROINTESTINAL ISSUES AND B12 SHOTS Persons who have gastrointestinal issues are particularly predisposed to issues with B12 deficiencies

I have been taking vitamin B12 for about 6 months and my energy and health are amazing

Research suggests it may influence skin barrier function and fibroblast activity, though human clinical data remains limited compared to other peptide therapeutics