In 2007, the French sports newspaper "L'Équipe" claimed that Thorpe "showed 'abnormal levels' of two banned substances in a doping test" in 2006 prior to his retirement. Thorpe denied the charges. The Australian Sports Anti-Doping Authority (ASADA) confirmed that they had investigated Thorpe in the past, for abnormal levels of testosterone and luteinising hormone (LH), but had dismissed the result. FINA dropped its investigation and closed the case. Thorpe has never been found to have used banned substances, and has denied allegations against him while also speaking out against drug use. He has called for the introduction of blood testing, promised to surrender a frozen sample for retrospective testing and repeatedly criticised FINA for drug-testing procedures that he regards as inadequate.