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(c) a reticulocyte response to B12 treatment
For research and educational purposes only
After reviewing literature and conducting a two-round Delphi survey with 42 experts, a consensus emerged that emphasizes prioritizing clinical symptoms in diagnosis, with serum B12 as a screening marker supported by methylmalonic acid or homocysteine levels for additional confirmation
Sebum, dead skin cells, and product buildup create a film that blocks active ingredients from reaching the skin
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