Meet Colombia's fattest baby who weighs the same as a six-year-old.

Colombia's most obese baby - who weighs the same as a six-year-old child - has been ‘rescued’ by a charity so he can undergo life-saving treatment.

Volunteers from Medellin-based Chubby Hearts foundation (Gorditos de Corazon) stepped in to transport the boy after his mother Eunice Fandiño wrote in asking for help.

He was flown from his home in the northeastern city of Valledupar to the capital Bogota on Sunday

His mother confessed that her own ‘ignorance’ had led to her son's unhealthy weight gain and that, every time he cried, she gave him food or milk to calm down.

‘He was born with an anxiety, so if he cried I just fed him,’ she added.