'Cocaine Cassie' drug smuggler looks unrecognisable as she shows off weight loss

'Cocaine Cassie' Sainsbury has proudly shown off her weight loss transformation as she sets her sights on returning to Australia to work as a personal trainer.

The 26-year-old is spending her final months on parole in Bogota, Columbia, after she was jailed for smuggling 5.8kg of cocaine into the country in April 2017.

Sainsbury has lost 29kg since her arrest and 12kg since she left prison in April last year.

The former prisoner has shared a series of snaps of her trim physique to her Instagram account recently looking almost unrecognisable to the woman arrested four years ago.

Sainsbury on Friday shared a photo of a handwritten manifesto written in Spanish which translated to a message about how friends and family should treat each other.

'Your friends must propose to you business not drunkenness,' one line read.

'Your family must support you not limit you. Your partner must help you progress not spend.'  

In an interview with Daily Mail Australia in July, Sainsbury detailed her daily life in and out of El Buen Pastor prison and shared her dreams of a simpler existence where she could finally shed her 'Cocaine Cassie' identity. 

Of her new beginning outside prison, she said: 'It's kind of like, this is where it all starts again.' 

Sainsbury spent three years in El Buen Pastor prison, locked in a two-metre by two-metre cell with up to five other inmates. She still has nightmares about it.

'We were woken up between 2.30 and 3.30 in the morning,' she claimed. Inmates were fed breakfast while it was still dark. 

Between 5am and 7am, the guards did a headcount. Sometimes they were friendly, other times 'inhumane', she claimed. 

'You were expected to be showered, beds made, cleaned. You never really knew when but you had to be ready.'