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But the FDA recently reclassified them, so they're no longer an option for most people
The doctor cites studies showing that oral B12 supplements can maintain adequate levels just as effectively as injections, especially if taken in high doses
B-12 injections bypass the digestive tract and deliver the vitamin directly into the bloodstream, ensuring quicker and more effective absorption
In this context, analytical methods such as HPLC peptide analysis and LC-MS verification can help evaluate purity, identity, molecular characteristics, and research material consistency
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