Joanna Yeates did not eat the pizza she was seen buying on her way home just before she went missing, police have confirmed.
Avon and Somerset Police said tests on Miss Yeates' body concluded she had not eaten the mozzarella, tomato and pesto pizza before she was found dead on Christmas Day three miles from her flat.
Detectives said Miss Yeates had made it home to her flat in Canynge Road, Clifton because her shoes, coat, mobile phone, purse and keys were found there - although the pizza, the wrapping and its box are still missing.
The final steps of the 25-year-old have been reconstructed for BBC's Crimewatch in a bid to catch her killer.
The landscape architect's journey started after leaving BDP where she worked.
She went to the Bristol Ram pub on Park Street in Bristol City centre, where she had Christmas drinks with work colleagues.
Miss Yeates spent around two hours socialising with her friends before leaving at around 8pm to make the 30 minute walk home to the ground floor flat in Canynge Road, Clifton, that she shared with her boyfriend Greg Reardon, 27.
She was seen on CCTV in a Waitrose supermarket at the Clifton Triangle and then went to a Tesco Express in Clifton village where she bought the pizza.
During the filming of the reconstruction the actress playing Miss Yeates entered the Tesco Express on Regent Street in Clifton village. She was wearing the same cream-coloured coat as Miss Yeates was wearing on the night she disappeared.
The BBC Crimewatch team spent an hour and a half filming at the Tesco Express before moving to another location to film earlier scenes from Miss Yeates's evening. It is hoped the film will jog someone's memory who may have seen Miss Yeates as she made her way home on December 17.