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Unlike fat-soluble vitamins (A, D, E, and K) that can build up, B12 has a strong safety record and toxicity is rare
The reference standard is scintigraphy : a test meal is labeled with a radioisotope, and a gamma camera tracks how quickly the labeled contents leave the stomach, yielding a half-emptying time (the T values quoted earlier for pramlintide came from this class of method)
A mechanism this broad implies that user-relevant effects could emerge at high doses or long durations that have not been studied formally
Whether it produces meaningfully better outcomes than once-daily dosing in humans remains unknown
Comprehensive testing: Quality providers run baseline bloodwork and follow-up testing to track response
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