Chandler man develops liver toxicity from green tea extract "I just started taking more and more to keep going,” the man said. "My abdomen was just crippling pain." Author: Trisha Hendricks Updated: 12:35 PM MST May 16, 2021 CHANDLER, Ariz. — A man from Chandler is sharing his story as a warning for others looking to boost their energy with supplements. Michael Sisco, 47, developed severe liver toxicity from consuming too much green tea extract. He thought he was taking a harmless amount of energy supplements for a boost to help get through his busy days. "I've just been feeling really tired, low energy,” said Sisco. "I've always taken supplements for energy just when I need them."