Dr Daniel Lanzer is Australia’s most well-known cosmetic surgeon, boasting millions of followers on Tik Tok and Instagram.

He’s performed thousands of procedures over more than 30 years and owns facilities in Melbourne, Sydney, Brisbane and Perth.

But a joint investigation by The Age, The Sydney Morning Herald and Four Corners has uncovered disturbing allegations of unsafe medical procedures at his clinics.

There were allegations some patients had 10 litres of fat and fluid removed in one procedure, and staff had been asked to store human fat in their fridges at home.

Daniel Lanzer, meanwhile, denies any wrongdoing.

Today on Please Explain, investigative reporter Adele Ferguson joins Bianca Hall to discuss her months-long investigation.