New Zealand Police have forensically tested tins of infant formula products following consumer concerns of possible pin pricks in the lids.
Police have since tested the tins and ruled out contamination with the of the 1080 pesticide.
This week, assistant commissioner Malcolm Burgess said all the tins that had been tested were found to be free of 1080.
"The test results appear to confirm the police view that issues highlighted by the public about the tins arose from normal manufacturing or handling issues," Burgess said.
The calls followed revelations last week that NZ dairy industry participants, including Fonterra, had received letters calling for an end to the use of 1080.
The letters threatened to contaminate dairy products with 1080 if it continued to be used for pest control beyond March 2015.
Food safety agency the Ministry for Primary Industries (MPI), also this week reassured consumers that New Zealand infant formula was safe.
"We would like to reassure New Zealand parents and caregivers that everything is being done to ensure infant formula bought from stores is safe and secure," MPI deputy director-general Scott Gallacher said.
"International consumers can also be assured these measures apply to infant formula exported from New Zealand."
