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As the use of these medications has increased, testing interpretation questions have followed
Where clinical suspicion remains high despite a normal serum B12, additional markers may be requested, including: Holotranscobalamin (active B12) a more specific marker of B12 status, available in some UK laboratories as an alternative or confirmatory test [11] [12] Methylmalonic acid (MMA) elevated in functional B12 deficiency
There is no established direct link between GLP-1 receptor agonists and magnesium deficiency
GHK-Cu is a common component of skin-care and cosmetic products
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