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Because your body cannot make B12 on its own, you must get it from food, supplements, or medical injections
Testing & COA: Each lot is run through HPLC and LC-MS, retested by an outside ISO/IEC 17025 lab, and endotoxin-checked with a pass/pass result on duplicate samples before release
Several things influence how long a B12 injection lasts for you: Your current B12 levels: the lower you start, the more your body tends to hold on to, which can stretch the effect
(2004) Cobalamin reduces homocysteine in older adults on folic acid-fortified diet: a pilot, double-blind, randomized, placebo-controlled trial
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