A young man developed severe hepatitis and jaundice after consuming an unregulated Chinese herbal coffee, identified as 'Jasmine Black Coffee' or 'Dian Er Wa'. Doctors initially struggled to diagnose the cause, ruling out common factors like viruses, alcohol, and prescription drugs. The patient's symptoms, including yellowing eyes and dark urine, resolved after he stopped drinking the herbal coffee. This case highlights potential health risks associated with unregulated herbal products and the importance of identifying toxic plant ingredients sometimes mislabeled as jasmine.