Mitchell said this morning that the issue was "more complex" than Collins has claimed.
"Part of it's a personal choice," he told Newstalk ZB's Mike Hosking, "but it's a lot more complex than that".
"Some obesity can be dealt with through exercise and diet, there's no doubt about that. But some obesity is related to medical conditions, even psychological conditions that need treating, so it's a more complex issue".
Earlier, National Party deputy leader and MP for Ilam Gerry Brownlee said there is no one else but himself to take responsibility for his large size.
"It's mine," the politician told ZB's Hosking this morning.
It comes as National leader Judith Collins doubled down on her obesity stance, describing it as a weakness and saying that people should not "blame systems for personal choices".
She said people who were obese needed to take some personal responsibility.
GPs this afternoon said her comments were “demeaning” and “dismally disappointing”.
He said he was against any state-mandated control on obesity, supporting Collins' remarks over people taking charge of their large weight.
"It is an issue that's not easy to deal with. She was saying take personal responsibility.
"To say that there should be some state-mandated action enforcing people to be a particular size, I think that's a step too far," he said.
This morning the National leader continued addressing the country's obesity problem saying it was a matter of personal responsibility.
She told MediaWorks that it was a case of eating healthy fresh food and exercising.
"I've seen it in my own family," she said.
"People have taken charge of their food and strangely enough they've lost weight. Any decent GP will say it's not that complicated."
Collins said she did not look at people and think "they're really fat".
It was a matter of speaking truthfully about the subject, she said.
"You can take charge of your life. It doesn't take much to get frozen veges in the freezer. It's not that hard."
Earlier when told that some had called her comments heartless, Collins said: "Do you know what is heartless? Is actually thinking someone else can cure these issues.
"We can all take personal responsibility and we all have to own up to our little weaknesses on these matters.
"Do not blame systems for personal choices."
Statistics from the Ministry of Health show that one in three New Zealanders over the age of 15 are obese.
Those living in areas of socio-economic deprivation are also more likely to be obese than those living in the least deprived areas.
In addition, the statistics show the prevalence of obesity among adults differs by ethnicity, with 67% of Pacific, 48%of Māori, 29% of European/other and 14% of Asian adults obese.
About one in nine children aged two to 14 are obese.
COMMENTS DEMEANING, SAY GPS
GPs this afternoon fired back at Collins’ “demeaning” and “dismally disappointing” comments about obesity being a personal responsibility.
“For a New Zealand leader to make those comments is really demeaning to people who are affected by obesity... it’s a hugely complex issue and it’s absolutely not that simple,” Dr Lynn McBain, who runs a GP clinic in Wellington, told The New Zealand Herald.
Earlier today, Collins doubled down on her obesity stance, describing it as a weakness and saying that people should not “blame systems for personal choices”.
“Any decent GP will say it’s not that complicated," she said.
However, multiple GPs have since spoken out in outrage.
McBain said many of her patients tried really hard to lose weight and for some it was a victory if they don’t gain weight or if over a period of a year they manage to lose a kilo.
“It’s not simple, it’s not simple at all.”
She said for some, genetic components came into play or they could be facing other health issues.
“For example some diabetic patients are in terrible situation where they need insulin medication but that very medication that doctors are encouraging people to take is causing weight gain.”
“If they don’t take it then their diabetes could get out of control and they could end up with renal failure, heart diseases, amputation or blindness.”
Taupō doctor Glen Davies said Colins’ comments were wrong and government and public health officials needed to take responsibility and stop blaming patients.
“The message to eat less and move more has been dismally disappointing and it’s actually resulted in the obesity and diabetes epidemic,” Davies said.
“Patients battling obesity have a metabolic illness and are very unwell people and they need specific dietary interventions.”
He said for many New Zealanders they had followed those public health guidelines and got fatter.
“That shows the guidelines were wrong, not the individuals. The key is we need to be eating the way that we did for the first 5.8 million years that humans were on the planet and not the last 40 years. ”
He said we needed to go back to eating whole foods and avoiding sugar and highly processed foods.
“I would love to see a government looking at the sale of sugary drinks. The only party making any mention of that is the Green Party.”
PM DISAGREES WITH COLLINS' COMMENTS
Speaking to media after a walkabout on her final campaign visit to Christchurch today, Prime Minister Jacinda Ardern said she disagreed with Collins' comments that people should take personal responsibility for obesity rather than blame the system.
"I disagree with her position, this is a change for the National Party. Under the leadership of John Key and Bill English, they did take a science and evidence base to this issue.
"It is another area you can see this is not the same National Party it once was."
Earlier in the day she said: "I think on an issue like this, people are, we are all, products of our environment. You can't deny that and so we do have to look at all the multiple factors that contribute to obesity issues in New Zealand.
"I think if you are so simplistic simply to call it an issue of personal responsibility, then it's never going to be an issue that we collectively resolve."
Ardern thought it demonstrated that "under National we won't see any progress on the issue".
"If it's just a view that they've got no role to play and that there's no difference that government can make on these issues, then it does tell you that on one of the most significant health issues we have you'll see nothing from the opposition on it."
TSUNAMI OF OBESITY PROBLEMS, PETERS WARNS
New Zealand First leader Winston Peters was asked about the issue as well.
"There's a tsunami of obesity problems coming down our track, it's a critical matter and our health system faces a nightmare unless we get going right here and right now to do something about it."
Asked if it was a matter of personal responsibility or external factors, he said: "It's a combination - frequently it's external factors, frequently it's some people sadly [have] got two or three jobs - their chances of actually stopping to ... follow good dining practices is not affordable. They are flat out with takeaway meals and what have you.
"We can all condemn them and say what we like but the reality is, they'll have sadly truncated lives and many illnesses which are avoidable and I'd like to think that this country has a seriously practical dialogue about it rather than just condemning people."
Looking forward to after the election, Collins today said the first thing she would do if elected to power on Saturday would be a quiet sit down with a hot drink.
"I'll probably sit down and have a cup of tea and bring back a lot of personal responsibility," she laughed.
- RNZ and NZ Herald
Comments
Collins is deluded if she thinks vegetables and meat is cheaper than processed food.
Fruit, vegetable and fresh meat prices are obscene in this country (don’t give me the seasonal argument) - I can buy NZ produce cheaper in a London than I can here.
We need to import more food (carbon producing I know!), remove GST from these items and break the monopoly for the grocery chains. All of which will never happen.
ODT 24/01/2020 - "Increased uptake of plant-based diets in New Zealand could substantially reduce greenhouse gas emissions while greatly improving population health and saving the healthcare system billions of dollars in the coming decades, according to a new University of Otago study."
So would removing all the academics from Otago University
First, they came for the commos, but I wasn't a commo. Soon, properties of the Large were vandalised.
Then, they came for the obese.
I am of course sorry for anyone who has to eat two dinners for medical reasons.
I find myself agreeing with Judith Collins for once. Everybody (the GPs and such) is so tied up with virtue signalling and saying the right things these days that they are glossing over the truth. Saying some people have medical reasons for obesity is like saying people should continue smoking because some lung cancers are not caused by smoking. It's disingenuous and facetious, the nation is facing a health crisis and it's no time for self aggrandisement by those repeatedly denying that the main cause of obesity is life choices.