What the Authoritative Sources Say About B12 Deficiency and Supplementation The National Institutes of Health Office of Dietary Supplements publishes the most thorough citation-backed overview of vitamin B12 its role in red blood cell formation and neurological function, the populations most at risk for deficiency (older adults, people on long-term metformin or proton pump inhibitors, vegetarians and vegans, people who have had gastric bypass surgery), and the recommended daily intake at each life stage
The important thing is to investigate why this B12 had such an impact and how you can safely replicate the effects
Low-dose B12 supplementation under strict medical supervision
In the end, choosing between methylcobalamin and cyanocobalamin should match your health goals and what your doctor recommends
PROTECT THE PRODUCT FROM LIGHT
This uptake depends on a protein called intrinsic factor (IF), which captures B12 in the small intestine, absorbing it in the final stretch of your small intestine (the ileum)