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A vial punctured 17 months into its 18-month shelf life carries a multi-dose window capped at the manufacturer expiration (roughly 30 days, in that case), not the full 28-day post-puncture window if those overlap
What Causes B12 Deficiency
Increases levels of cytotoxic T cells, which help destroy pathogens and sick cells
Symptoms of B12 deficiency can appear in years because the body naturally stores the vitamin in the liver
No completed, peer-reviewed human efficacy or long-term safety trial exists as of 2026
In 2021, the FDA approved the first new class of weight loss medications after almost a decade, the Semaglutide or GLP-1
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