An 18 year old boy was going gym since 1 week. There he was given some protein powder. There after he had hyperbilirubinemia, direct more than indirect hyperbilirubinemia. But patient was totally asymptomatic. No fever, no abdominal pain, no vomiting, no itching. All liver enzymes are normal, sgot, sgpt, ALP, LDH all normal.

INR normal and bilirubin is increasing trend. All viral markers negative. No hemolysis. USG abdomen normal. What could be the diagnosis?