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serious events have not been documented in limited human observations

After having bariatric surgery, the stomach produces less intrinsic factor, a protein necessary for the absorption of vitamin B12

It also boosts energy, helping to increase activity levels

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Many Amazon listings sell unverified cosmetic-grade liquids labeled as reconstitution solution to sidestep regulation and these products often skip the 0.9% benzyl alcohol preservative altogether, or fail to meet USP (United States Pharmacopeia) standards entirely

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