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Vitamin B12, also known as cobalamin, is a crucial water-soluble vitamin that plays a vital role in various bodily functions
Notes: Muscarine and nicotine are naturally occurring alkaloids that were used to pharmacologically identify and characterize receptor subtypes before the endogenous neurotransmitter (acetylcholine or Vagusstoff) was identified
This article has been updated by The Pharmaceutical Journal team and reviewed by the expert authors to ensure it remains relevant and up to date, following its original publication in December 2025
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