Authorities are looking into whether it holds a valid licence and followed health and safety protocols, a health ministry official told AFP.
He was having a massage after receiving the filler when he complained of chest pains and collapsed, according to an August report from the British coroner, which formally determines the cause of death.
He was taken by ambulance to hospital, suspected of having a pulmonary embolism, but lost consciousness before he could have a CT scan.
Medics tried to resuscitate him for more than 100 minutes but he was declared dead around 1am.
“Post-mortem examination and toxicology determined the cause of death to be due to the hyaluronic acid injection,” the report said.
Senior Bangkok police official Utit Soodjai told AFP his officers were also investigating.
“When it comes to medical procedures, we advocate for the highest level of caution,” Thai Health Minister Pattana Promphat told reporters.
The probe was intended “to ensure fairness for everyone and to reassure both local and international patients that they are receiving safe, high-standard and valuable care in Thailand”, he said in a statement.
According to the health ministry, the clinic’s managers said Ubiribo had been a regular patient since 2024 and had undergone five penile enlargement injections.
Igho Ubiribo had been a regular patient of a clinic in Thailand since 2024. Photo / diananelloinspire
The first four procedures took place in 2024 and 2025, while on his fifth visit on March 5 he received 40ml of filler.
The doctor had recommended splitting the procedure into two sessions, but Ubiribo requested the entire amount be injected in one session, clinic management told investigators.
Hyaluronic acid fillers are widely used in aesthetic medicine, considered minimally invasive and relatively low risk.
Thailand has a reputation for excellent healthcare and has long been a centre for medical tourism, while the aesthetic market is booming.
As of 2024, official figures showed it had 7000 aesthetic clinics, including 2000 in Bangkok, and forecast a market worth US$7.51 billion ($12.81b) in 2027 – three times the size in 2020.
– AFP