Porn Star Christian Styles' Cause of Death Revealed

Porn star Christian Styles' death was caused by heavy drinking and kratom use ... which is called "gas station heroin" ... TMZ has learned.

According to Michigan’s Wayne County Medical Examiner … Christian died due to alcohol and mitragynine toxicity. Mitragynine is the active ingredient in Kratom, which is a product sold without a prescription for pain relief and energy.

The report says Christian had a 0.168 BAC, mitragynine, and several of its breakdown products in his blood. The porn star was found dead inside a bedroom in his home when his parents came to check on him.

The report says Christian had been on a bender with various substances and had a history of abusing heroin and meth, and his parents had been checking on him hourly, with his last known alive time at 3 pm.

His parents told investigators Christian had a history of ODs and other run-ins with law enforcement. No drugs were found at the scene, but an accidental OD was suspected.

Christian was 29. He became famous after getting into the adult biz in 2021.