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This may result in either too little or too much B12 in your system, both of which can be harmful over time

It helps produce healthy red blood cells, supports the nervous system and brain function, and boosts immune system health

After reviewing 109 products across dozens of brands, the pattern was clear: a crowded market full of overpromising labels, under-dosed ingredients, and a near-total absence of meaningful evidence

doi:10.1002/jor.20096 Cerovecki T, Bojanic I, Brcic L, Radic B, Vukoja I, Seiwerth S, Sikiric P

We use cyanocobalamin by default, the form of B12 with the longest clinical history, the most extensive research support, and the consistent potency needed for repeated treatments