Hypoglycin
Hypoglycin may refer to: * Hypoglycin A * Hypoglycin B Hypoglycin B is a naturally occurring organic compound in the species '' Blighia sapida''. It is particularly concentrated in the fruit of the plant especially in the seeds. Hypoglycin B is toxic if ingested and is one of the causative agents of ...

Hypoglycin A
Hypoglycin A is a naturally occurring amino acid derivative found in the unripened fruit of the Ackee tree ('' Blighia sapida'') and in the seeds of the box elder tree ('' Acer negundo''). It is toxic if ingested, and is the causative agent of Jamaican vomiting sickness. A 2017 Lancet report established a link between the consumption of unripened lychees (containing hypoglycin A or methylenecyclopropylglycine (MCPG)) resulting in hypoglycaemia and death from acute toxic encephalopathy. Sources The entirety of the unripe Ackee fruit is toxic and contains large amounts of hypoglycin. The fruit is safe to eat only when the fruit is allowed to fully open and expose the large black seeds while on the tree. The levels of the toxin decrease over time though from approximately 1000 ppm to around 0.1 ppm in the mature fruit. Relatives of Ackee, including lychee, longan, and rambutan, can contain enough α-(methylenecyclopropyl)glycine, a homologue of hypoglycin A, in their fruit to cau ...
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