Although extremely rare, there have been cases where people have developed a redness or a rash around the injection site indicating a Vitamin B12 allergy
Adjacent innovations shown at the event, such as water-free stick formats and melt-in-mouth, directly-dosed powders, point the same direction: reduce the volume and the effort a user has to tolerate
doi: 10.1002/PEN.26184 66 HanlonJ

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