While it's speculated to be easier to absorb than cyanocobalamin, research hasn't shown a meaningful difference
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This DSIP nasal spray is supplied for in-vitro laboratory research, is not intended for human or veterinary use, is not a drug, supplement or sleep aid, and has not been evaluated by the FDA for the research-chemical context
Dose-escalation toxicological assessments of Sh28GST adjuvanted with alum induced transient local inflammatory reactions and no clinical, anatomical or physiological modifications among rodents (168)
Qin, J., Yang, T., Kong, F
Absorption : Water-soluble vitamins are readily absorbed in the small intestine, while fat-soluble vitamins are first absorbed in the lymph, later stored inside a liver and fatty tissues