Authorities are testing an orange purchased at a Brisbane fruit and vegetable shop that turned purple after it was cut.
Neti Moffitt cut the orange for her two-year-old son on Tuesday, giving him some slices but leaving others out overnight.
The following day, both the remains in the bin and the leftover slices had started to turn bright purple.
"It looked like someone had dipped it on an ink pad, which I guarantee you we haven't," she told the ABC on Friday.
"My first thought was I hope it has had no ill effect on my child. But he's fine, absolutely not a drama."
