impaired glutathione synthesis b12 usmle 🩸 Vitamin Absorption – Step by Step, 1️⃣ Dietary vitamin B12 is released from food proteins by gastric acid and pepsin in the stomach., 2️⃣ Free B12 immediately binds to haptocorrin (R-protein) Medication Type:Nasal Spray lab reagent water drinking alcohol after b12
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