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New research showed men who consumed less than 40% of their total energy from carbohydrates experienced significantly higher risks of all-cause and cancer-related mortality

Extreme dietary habits for carbohydrates and fats affect life expectancy: Study

https://medicalxpress.com/news/2023-08-extreme-dietary-habits-carbohydrates-fats.html

A new study, published in The Journal of Nutrition, suggests that extreme dietary habits involving carbohydrates and fats affect life expectancy. Researchers from Nagoya University Graduate School of Medicine in Japan led by Dr. Takashi Tamura found that a low carbohydrate intake in men and a high carbohydrate intake in women are associated with a higher risk of all-cause and cancer-related mortality and that women with higher fat intake may have a lower risk of all-cause mortality.

Extreme dietary habits for carbohydrates and fats affect life expectancy: Study

29 comments

CanadianNomad

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JoBo

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It's paywalled and sci-hub doesn't have it.

There's something very weird about the numbers:

34,893 men and 46,440 women ... 2783 deaths (1838 men and 945 women)

30% more women in the study but only half as many deaths? That doesn't make any sense. There's something very wrong with the sample or the follow-up or both.

XeroxCool

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Plus all the variables in the lifestyle associated with different diets. Diet soda probably doesn't actually cause weight gain, but people turning to diet soda probably eat poorly already. This also only seems to show food intake percentages but not the total calorie intake. So do the high carb eaters just eat one potato per day? And the high fat eaters 6lbs of pork? This a multi dimensional problem needing more data to find the real trend. I mean, people with gun permits have a higher chance to be shot by a gun. Is it because the permit shoots the? Or is it because permit holders are more likely to be in a place where guns are more common?

SkyezOpen

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Oh shit I stuff myself with pasta bread and potatoes I must be immortal.

captainlezbian

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How much of that is them eating nothing but meat

TigrisMorte

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fine print reads: paid for by the Bakers United Association.

VeganSchnitzel

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Is this a joke or is it actually industry financed? This article doesn't mention that and neither does the freely accesible part of the original study (though I don't have full access).

TigrisMorte

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It is a cynical commentary on unreliability of such reports. Bakers are always cooking up something.

QuaffPotions

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I'm a little surprised by how much incredulity there is in the comments here. It's amazing that anyone, let alone so many people right now, would think that taking away all the most protective foods (ie., plants in their whole, intact forms, which are almost invariably high carb), and in most cases replacing them with the very substances most strongly associated with our number one killers, cardiovascular disease and cancers, (ie., animal flesh, dairy, and insane amounts of saturated fats), and act surprised when it kills them faster.

https://www.acc.org/latest-in-cardiology/articles/2020/10/07/13/54/very-low-carbohydrate-and-ketogenic-diets-and-cardiometabolic-risk

Blaidd

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Low carb diets do not neglect vegetables, if you're eating a proper low carb diet then about half of your food volume should be coming from things like broccoli, cauliflower, and spinach. https://www.thekitchn.com/10-vegetables-that-are-lower-in-carbs-than-you-think-253337

Low carb diets still eat about 50-75 grams of carbs a day, and that's a lot of broccoli.

Astroturfed

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I did a keto diet for about a year. Every meal was about 2/3 veggies. The problem with low carb diets is most people don't do them healthy. They see that certain things are listed as ok to eat and they just eat that and don't follow a balanced regimented diet.

Hardeehar

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That's what I try to explain to my friends. Keto can be looked at two ways.

Red keto - mostly meat, eggs, cheese

Green keto - getting a majority of nutrition from vegetables and avocados, etc

The red keto diet isn't as good for you as green keto is.

set_secret

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The Japan Multi-Institutional Collaborative Cohort Study investigated the relationship between dietary carbohydrate and fat intakes and the risk of mortality in the Japanese population[1]. The study found that:

An unfavorable association with mortality was observed for low-carbohydrate intake in men and for high-carbohydrate intake in women[1].
High fat intake could be associated with a lower mortality risk in women among Japanese adults with a relatively high carbohydrate intake[2].
The Prospective Urban Rural Epidemiology study demonstrated that high-carbohydrate and low-fat intakes were associated with an increase in risk for mortality[3].
Extreme dietary habits involving carbohydrates and fats affect life expectancy[4].
Men with high fat intake had a higher risk for cancer mortality; the multivariable-adjusted HR (95% CI) for ≥35% was 1.79 (1.11-2.90) compared with 20%-<25% [5].

the study suggests that extreme dietary habits, particularly those involving carbohydrates and fats, can affect life expectancy in the Japanese population. It is important to consider these findings when making dietary recommendations and promoting a balanced diet for optimal health.

Citations: [1] https://pubmed.ncbi.nlm.nih.gov/37271417/ [2] https://www.sciencedirect.com/science/article/abs/pii/S0022316623721986 [3] https://www.sciencedirect.com/science/article/pii/S0022316623721986 [4] https://omniaeducation.com/news/extreme-dietary-habits-for-carbohydrates-fats-affect-life-expectancy-findings-from-a-large-scale-cohort-study-in-japan/2452354/ [5] https://www.researchgate.net/publication/371268749_Dietary_carbohydrate_and_fat_intakes_and_risk_of_mortality_in_the_Japanese_population_the_Japan_Multi-Institutional_Collaborative_Cohort_Study [6] https://jn.nutrition.org/article/S0022-3166(23)72198-6/pdf

Corkyskog

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But what if you're not Japanese? I know you can extrapolate out generally, but it's one of the most ethnically homogeneous countries. We know different genetic traits can play a large impact on dietary needs. So it's a shame this isn't a more diverse country like some countries or parts of North and south America or some countries in Africa.

set_secret

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I'd say extreme dieting issues would apply to all homosapians given the bottle neck at most we're like 6th or 7th cousins or something. so we're actually all very genetically similar.

Aux

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Inuit diet is 99% meat and fish. People don't need plants at all.

Hazdaz

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That's not good for Keto'ers

Nepenthe

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On the other hand, among women with five years or longer of follow-up, those with a high carbohydrate intake of more than 65% had a higher risk of all-cause mortality. No clear association was observed between refined or minimally processed carbohydrate intake and the risk of mortality in women.

For fats, men with a high fat intake of more than 35% of their total energy from fats had a higher risk of cancer-related mortality. They also found that a low intake of unsaturated fat in men was associated with a higher risk of all-cause and cancer-related mortality.

In contrast, total fat intake and saturated fat intake in women showed an inverse association with the risk of all-cause and cancer-related mortality. They concluded that this finding does not support the idea that high fat intake is detrimental to longevity in women.

So, hesitantly, keto is terrible for men but fine enough for women? Like we weren't already outliving them in general. I'd just be dying to know why, though. You don't just casually tell me dietary requirements noticeably differ by sex and then never elaborate

ryannathans

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Yeah but which fats? They vary wildly in toxicity and function

evanuggetpi

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Indeed. And eating bacon is not the same as eating avocado.

ryannathans

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Yep, even olive oil can behave undesirably in the presence of heat, unless mixed with a small amount of butter. It's these intricacies that ruin all studies that just look at "fat" consumption

TigrisMorte

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Rendered long pig fat is the best.

Lafuma300

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An industry-financed epidemiological study; we're shaking in our boots I tell ya.

VeganSchnitzel

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Where is it written that it is financed by industry? That's not in the article or in the part of the original study I can access.

Astroturfed

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Unfortunately almost all these studies are financed by some lobbying group or food industry group. There's a disturbing amount of misinformation and studies out there. What's "healthy" seems to change every 5-10 years. Low fat foods just had more sugar, which all the studies show is bad for you.

The obvious answer is always that anything you know isn't healthy, fat, sugar, simple starches, dairy should all be consumed in moderation as part of a balanced diet and people need to eat an appropriate amount of calories. Eat more vegetables and healthy fruits. Less processed food. Ignore anything that's weird trendy bullshit.

Pipoca

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From the article:

However, this study shows that low-carbohydrate and low-fat diets may not be the healthiest strategy for promoting longevity, as their short-term benefits could potentially be outweighed by long-term risk.

If you read the study, the lowest mortality is around 50% of calories from carbohydrates. There's a u-shaped curve, although low carb seems more dangerous than high carb.

That seems to suggest something like the Mediterranean diet or a traditional Japanese diet, not very low fat diets.

datelmd5sum

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Great for beer drinkers.

CharlestonChewbacca

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I've been saying this for a long time. It's a great way to lose weight fast, but it is NOT a long term health diet.

Nonameuser678

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I would have thought it would be the opposite but there you go.

redballooon

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Do you consume a lot of influencer output on the topic?