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Typically, plasma or serum B12 levels are measured, with the ideal range for adults between 170 and 250 pg/mL

By bypassing the digestive system, injections deliver nutrients directly into the bloodstream resulting in higher bioavailability and faster onset

Yes, but stacking more than two metabolic compounds simultaneously increases complexity and makes it difficult to attribute effects to specific agents

The animals were anesthetized by inhalation route with Isofluorane (Isboa Vet) using a vaporizer and intranasal administration was performed with two instillations of 20 l of the bacterial suspension prepared in PBS