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Jonathan Gelber is a board-certified orthopedic surgeon specializing in integrative and whole-body wellness

Drug Metabol Drug Interact 13, 8798

Thus, we additionally screened for the presence of N-terminal extensions to determine the presence or absence of a putative targeting peptide (Additional files 2, 3, 4, 5, 6, 7, 8)

The potential benefits associated with obtaining long-chain omega-3 fatty acids through moderate consumption of fish (e.g., 1-2 servings weekly) during pregnancy and lactation outweigh any risks of contaminant exposure, though fish with high concentrations of methylmercury should be avoided (218)

When serum B12 results are equivocal or clinical suspicion remains high despite normal B12 levels, additional tests may be requested: Methylmalonic acid (MMA) : Elevated levels indicate functional B12 deficiency at the cellular level, though availability may be limited in primary care and levels can be elevated in renal impairment Homocysteine : Also elevated in B12 deficiency, though less specific and also affected by renal function Intrinsic factor antibodies : To investigate pernicious anaemia, the most common cause of B12 deficiency in the UK Anti-parietal cell antibodies : May be tested if pernicious anaemia is suspected but intrinsic factor antibodies are negative Identifying the underlying cause is crucial for appropriate management