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These procedures can result in a loss of cells that secrete intrinsic factor a protein in the stomach needed to absorb B12
Iran J Allergy, Asthma Immunol 18:649654
The animal research itself shows remarkable consistency
Beyond these three papers, review articles referencing the human peptides discovery in the 1970s continue to shape how researchers frame new hypotheses, particularly around why plasma concentration declines with age and what that means for tissue-repair capacity over time
However, these agents often lack selectivity, potentially causing unnecessary damage and apoptosis in normal cells (Marcus et al., 2018
Most acute side effects are dose-dependent and rate-dependent
