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This injection contains a single nutrient:: Methylcobalamin (Vitamin B12) Methylcobalamin is known for its bioavailability and role in supporting nervous system balance, energy metabolism and cognitive wellness
Compared to placebo, B-vitamin supplementation in these older subjects also improved a measure of executive function, a secondary outcome of the trial (93)
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
For patients whose prior B12 supplementation hasn't worked, injection is the solution not a higher oral dose