A long-term US study shows water fluoridation at recommended levels doesn't reduce cognitive ability.

The 40-year study found children who drank such water did slightly better in school tests.

By 60, that edge was insignificant, but fluoride didn't contribute to cognitive decline.

Dentist Justin Wall says this puts this particular argument to bed - but theories about fluoride are bound to continue.

"People would probably blame fluoride for mullet haircuts and not getting the Lotto numbers right if they could. But at the end of the day, fluoride is very highly researched."

LISTEN ABOVE

A long-term US study shows water fluoridation at recommended levels doesn't reduce cognitive ability.
The 40-year study found children who drank such water did slightly better in school tests.
By 60, that edge was insignificant, but fluoride didn't contribute to cognitive decline.
Dentist Justin Wall says this puts this particular argument to bed - but theories about fluoride are bound to continue.
"People would probably blame fluoride for mullet haircuts and not getting the Lotto numbers right if they could. But at the end of the day, fluoride is very highly researched."
LISTEN ABOVE

With a straight down the middle approach, Heather du Plessis-Allan Drive on Newstalk ZB delivers the very latest news and views to New Zealanders as they wrap up their day.

Heather du Plessis-Allan Drive

Dr Justin Wall: dentist on the research confirming fluoride doesn't reduce cognitive ability

https://api.omny.fm/orgs/7784f840-c291-422a-924b-ad9000bbad71/clips/9ee9837f-8b4f-4d76-b3c4-b39b003b66ae/transcript

On the Heather du Plessis-Allan Drive Full Show Podcast for Friday, 8 May, 2026, Winston Peters insists he won't support efforts by the National Party to raise the retirement age.

We talk to one of the women who's accused Sir Rod Drury of inappropriate conduct about him handing back his New Zealander of the Year award.  

The New Zealand Herald's media insider Shayne Currie on who should succeed Maiki Sherman as TVNZ's political editor.

And on the Sports Huddle, Adam Cooper and Paul Allison discuss Luke Metcalf's future with the Warriors.

Get the Heather du Plessis-Allan Drive Full Show Podcast every weekday evening on iHeartRadio, or wherever you get your podcasts.

LISTEN ABOVE 

On the Heather du Plessis-Allan Drive Full Show Podcast for Friday, 8 May, 2026, Winston Peters insists he won't support efforts by the National Party to raise the retirement age.
We talk to one of the women who's accused Sir Rod Drury of inappropriate conduct about him handing back his New Zealander of the Year award. &nbsp;
The New Zealand Herald's media insider Shayne Currie on who should succeed Maiki Sherman as TVNZ's political editor.
And on the Sports Huddle, Adam Cooper and Paul Allison discuss Luke Metcalf's future with the Warriors.
Get the Heather du Plessis-Allan Drive Full Show Podcast every weekday evening on iHeartRadio, or wherever you get your podcasts.
LISTEN ABOVE&nbsp;

Full Show Podcast: 08 May 2026 

https://api.omny.fm/orgs/7784f840-c291-422a-924b-ad9000bbad71/clips/5f050b96-d294-49e8-97c9-b4440076ac8c/transcript

Prime Minister Christopher Luxon plans to start lifting the pension age if National get back into government after the coming election.

Bipartisan support will most likely be needed to make this happen as parties, like NZ First, are staunchly against the reform.

"Please do not attack grandmother and grandmother's savings to try and disguise for a brief time your economic incompetence," Winston Peters said to Heather du Plessis-Allan

LISTEN ABOVE

Prime Minister Christopher Luxon plans to start lifting the pension age if National get back into government after the coming election.
Bipartisan support will most likely be needed to make this happen as parties, like NZ First, are staunchly against the reform.
"Please do not attack grandmother and grandmother's savings to try and disguise for a brief time your economic incompetence," Winston Peters said to Heather du Plessis-Allan
LISTEN ABOVE

Winston Peters: NZ First leader says Nats, Labour have record of 'attacking super'

https://api.omny.fm/orgs/7784f840-c291-422a-924b-ad9000bbad71/clips/2be98621-7bfc-463b-9d8b-b44400717f79/transcript

If it’s not already obvious to you, the fact that Maiki Sherman has lost her job should now make it very clear: the media—especially the state broadcasters, both of them—are about to find out what it means not just to make and report the news but to be the news.

Just look at what’s happened this week alone. And this is only a sample—this has been building for some time.
In one week, TVNZ political editor Maiki Sherman has lost her job over poor behaviour in a minister’s office. David Seymour, the ACT Party leader, has taken a significant swipe at RNZ for hiring John Campbell, who is well known for voting left—something he’s said himself. Seymour has even gone so far as to suggest the head of RNZ should lose his job over it.

Then there’s the BSA, effectively the head girl telling everyone off for bad jokes at the party, being abolished.

The politicians are coming for the media and Sherman’s case is an example of that. The National Party lined her up. They complained about her allegedly door-knocking Stuart Smith for 10 minutes at night. They confirmed that she had sworn at Nicola Willis’ event in the office—which was unusual, given that Nicola effectively broke Chatham House rules that MPs normally guard jealously.

Now, look—I feel sorry for Maiki losing her job. That’s a very high price to pay. But I don’t feel sorry for the media in general for what’s coming. We’ve had this coming.

For years, we’ve collectively pushed a certain world view through the framing of our stories. We decide who the victim is, who the bad guy is and what language we use—labelling things as “controversial” to signal to the audience that something is bad, like the “controversial Treaty Principles Bill”.

We flip angles too—turning a positive government crime stats story into a negative gang-focused story for the same government.

And when Radio New Zealand, which is supposed to be more impartial and balanced than any other outlet in this country, chooses someone to front its flagship programme who has explicitly said he votes for left-wing parties—well, that matters.

We deserve what’s coming to us in this election. We can’t shove the scrum for years and not expect to become part of the on-field play.

And I, for one, am not unhappy about what’s about to happen. I think it’s time for this to be sorted out. If this election brings media bias into sharper focus and forces all of us in the media to stop, reflect and think hard about what we’ve been doing, I don’t think that’s a bad thing.

LISTEN ABOVE

If it’s not already obvious to you, the fact that Maiki Sherman has lost her job should now make it very clear: the media—especially the state broadcasters, both of them—are about to find out what it means not just to make and report the news but to be the news.
Just look at what’s happened this week alone. And this is only a sample—this has been building for some time. In one week, TVNZ political editor Maiki Sherman has lost her job over poor behaviour in a minister’s office. David Seymour, the ACT Party leader, has taken a significant swipe at RNZ for hiring John Campbell, who is well known for voting left—something he’s said himself. Seymour has even gone so far as to suggest the head of RNZ should lose his job over it.
Then there’s the BSA, effectively the head girl telling everyone off for bad jokes at the party, being abolished.
The politicians are coming for the media and Sherman’s case is an example of that. The National Party lined her up. They complained about her allegedly door-knocking Stuart Smith for 10 minutes at night. They confirmed that she had sworn at Nicola Willis’ event in the office—which was unusual, given that Nicola effectively broke Chatham House rules that MPs normally guard jealously.
Now, look—I feel sorry for Maiki losing her job. That’s a very high price to pay. But I don’t feel sorry for the media in general for what’s coming. We’ve had this coming.
For years, we’ve collectively pushed a certain world view through the framing of our stories. We decide who the victim is, who the bad guy is and what language we use—labelling things as “controversial” to signal to the audience that something is bad, like the “controversial Treaty Principles Bill”.
We flip angles too—turning a positive government crime stats story into a negative gang-focused story for the same government.
And when Radio New Zealand, which is supposed to be more impartial and balanced than any other outlet in this country, chooses someone to front its flagship programme who has explicitly said he votes for left-wing parties—well, that matters.
We deserve what’s coming to us in this election. We can’t shove the scrum for years and not expect to become part of the on-field play.
And I, for one, am not unhappy about what’s about to happen. I think it’s time for this to be sorted out. If this election brings media bias into sharper focus and forces all of us in the media to stop, reflect and think hard about what we’ve been doing, I don’t think that’s a bad thing.
LISTEN ABOVE

Perspective with Heather du Plessis-Allan: The media is under scrutiny and we've had it coming

https://api.omny.fm/orgs/7784f840-c291-422a-924b-ad9000bbad71/clips/d76df1eb-2c60-4461-aafd-b444006decbc/transcript

Dr Justin Wall: dentist on the research confirming fluoride doesn't reduce cognitive ability

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