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doi: 10.3390/cells13100879 77 KellerALReimanLTPerez De AchaOParzychSEForsbergPAKimPSet al

It is not known if Cyanocobalamin Nasal Spray is effective in people that currently have a stuffy nose, allergies or an upper respiratory infection

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Gastrointestinal Conditions: Disorders like Crohn's disease, celiac disease, or atrophic gastritis can impair absorption
