I really don't think your reaction is like caffeine.
When doctors test people under the tongue with substances they cannot tolerate...the do get reactions. (this practice is not accepted by all doctors however).
But the cyano is what is triggering you, not the cobalamin part IMO.
Try swallowing instead of under the tongue. There may be no reaction that way.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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