https://kibbleiq.com/blog/can-cats-eat-chocolate
Can Cats Eat Chocolate? Theobromine, Caffeine, Toxic Doses & Emergency Steps | KibbleIQ
Chocolate is toxic to cats (rated F by KibbleIQ). Theobromine and caffeine cause seizures, arrhythmia, and death. Any ingestion is a veterinary emergency.
catseatchocolatetheobrominecaffeine
https://phytohub.eu/entry_food_sources/2050
PhytoHub: Publications for Theobromine being present in Guarana
Phytochemical Metabolite Database
being presentpublicationstheobromineguarana