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The vitamin B-12 is then exported into the portal circulation where it is bound to the transport protein, transcobalamin, which delivers the newly absorbed vitamin B-12 to all tissues of the body where it is taken up by receptor-mediated endocytosis

This is great for those with severe deficiencies or trouble absorbing it

The main details to compare are mL capacity, unit markings, needle gauge, needle length, and whether the needle is fixed or detachable

The authors mentioned that intranasal administration facilitated brain-targeted delivery (DTE % = 314.29%) owing to the nanoscale size and lipid nature of liposomes, which facilitated the transcellular transport of drug molecules via various endocytic pathways in sustentacular and neuronal cells within the olfactory membrane