A chemical found in green tea helped moderately diabetic mice tolerate sugar and produce insulin as well as GlaxoSmithKline Plc's Avandia pill did in a study.

Five-week-old moderately diabetic and severely diabetic mice were fed the compound, an antioxidant called epigallocatechin gallate or EGCG, or given Avandia. The rodents' blood sugar and insulin levels were studied after five and 10 weeks of treatment. The moderately diabetic mice fared as well on green tea extract as they did on Avandia, also known as rosiglitazone, the researchers reported. EGCG was not as effective in the severely diabetic group.