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This material is a laboratory reference standard supplied strictly for in vitro and preclinical research
B12 is safe for most people
Because oral B12 supplements face a hostile digestive tract where up to 90% of the nutrient is lost, our clinical-grade intramuscular injections bypass the gut entirely
Much of it is excreted through urine
Used poorly, or by patients shopping on the gray market, they are a waste of money or a real safety problem
What the research actually says versus what marketing materials claim
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