Mental health advocates are appealing for calm and informed debate over the Indigenous voice to avoid harm from racism.
Prime Minister Anthony Albanese is also urging Australians to call out any incorrect or misleading information about the voice.
As parliament debates the form the referendum will take, Mr Albanese said those advocating for a 'no' vote were resorting to scare campaigns.
"When people say some of the claims that have been made I do think you've got to call it out," he said.
"I respect the fact some people will come to a different conclusion, that's their right to in a democracy, but it would be good if we kept the debate on a realistic plane and not jump at shadows."
Beyond Blue warned of the harm caused by racism and discrimination as the mental health support service backed a 'yes' vote.
It also announced Ken Wyatt, who quit the Liberal Party over its opposition to the voice, had joined the organisation's board.
"I’m looking forward to becoming part of an organisation that has the courage to advocate for what’s fair and right," Mr Wyatt, a former Indigenous Australians minister, said.
Beyond Blue chair and former prime minister Julia Gillard called for a respectful debate, warning racism and discrimination could do profound harm to mental health.
Yes 23 campaign director Dean Parkin welcomed support for the voice from the mental health organisation.
“The 'yes' campaign continues to build a movement that represents the broad spectrum of support for constitutional recognition through a voice to parliament," he said.
"We are humbled and energised by the support from all quarters."
With the federal coalition digging in against the voice, Nationals leader David Littleproud said the government was focused on “niche social issues" when people were financially doing it tough.
But Indigenous Australians Minister Linda Burney said the country had nothing to lose by establishing the advisory body.
"Australians know in our hearts that the time is now," she told parliament.
"We want a more united Australia, a more reconciled Australia and there is no better time for Reconciliation Week to start having those conversations.
"Now is the time for all Australians to put their shoulder to the wheel."
A lower house vote on the referendum question and constitutional change will take place on Wednesday, before debate shifts to the Senate.
The bill is expected to pass parliament in June, before the referendum is held later this year.
13YARN 13 92 76
Aboriginal Counselling Services 0410 539 905
Lifeline 13 11 14
beyondblue 1300 22 4636
