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Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

ncbi.nlm.nih.gov

41–50 of 315 posts

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#41
post #11

Isn’t this at least easy to fix? Required amounts of dietary minerals are minuscule: 50 mg iron, 15 mg zinc and less than 2 mg of the other transition metals and P. Presumably fertilizer could include trace amounts of these elements without substantial cost increases? (Ca/K/Mg are already in fertilizer.)

I think plants may require symbiotic microbes to efficiently process some of these dietary minerals, and modern agroindustrial farming has damaged soil biodiversity and carrying capacity.

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#42

Earlier quoted context omitted.

Presumably, using natural fertilizers would make a difference, as you'd expect a wider range of minerals than in straight haber-process fertilizer. I don't know if natural fertilizers are always a requirement for organic food, though.

If this is actually a problem, I'd much rather someone figure out which minerals need to go into the fertilizer mix (plus some downstream monitoring) than to assume that putting poop on the vegetables makes them wholesome.

Ten thousand years of agriculture is an assumption?

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#43
post #2

The link got that actual paper is much better than a sentence or two on LinkedIn. The paper’s title isn’t as catchy to put in nicely. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163803/ From my link: >It is important to note that the USDA mineral content of vegetables and fruits has not been updated since 2000, and perhaps even longer, given that the data for 1992 was not able to be definitively confirmed for this…

If organic food actually had a noticeably higher mineral count than nonorganic, I would start eating it. But I don’t see why organic food would actually have more minerals. Organic doesn’t mean healthier it just means that it uses different kinds of pesticides, to my knowledge

Adjacent: Butter/milk from grass-fed cows has a noticeably better amino acid profile

https://www.ncbi.nlm.nih.gov/pubmed/10531600/ https://www.ncbi.nlm.nih.gov/pubmed/7905466/

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#44

Earlier quoted context omitted.

If organic food actually had a noticeably higher mineral count than nonorganic, I would start eating it. But I don’t see why organic food would actually have more minerals. Organic doesn’t mean healthier it just means that it uses different kinds of pesticides, to my knowledge

https://www.ams.usda.gov/publications/content/introduction-o... >Soil Fertility: Crops more easily resist disease, survive drought, and tolerate insects when grown in good soil. Organic crop producers build soil quality by adding compost, animal manures, or green manures. As soil organisms break down these inputs, they convert nutrients into forms plants can absorb and create humus that sustains soil quality. Organic…

There is nothing about organic that means it builds soil. Conventional farmers are adapting the same practices. In many cases conventional farming with "chemicals" does better: because of roundup a cover crop can be applied much easier - you can kill it when you are done vs having to plow it up (plowing is a horrible thing to do to soil). I find it amusing they separate "sewage sludge" from manure as if they are not the same thing.

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#45
post #24

These are normalized mass rates, ie grams per gram of plant mass. However, the mass yield per acre of cabbage has radically increased over that time period. Is it possible that a cabbage plant is capable of absorbing an absolute amount of minerals, and this is simply being diluted by ever-larger cabbages?

The explanation I've heard is that the total mineral content is about the same, but plants are producing more carbohydrates now due to an increase in atmospheric CO2, diluting the minerals.

Consequently, if humans eat according the amount of minerals in the food, the increase in carbohydrates could also explain the increase in obesity.

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#46

Earlier quoted context omitted.

Don't forget meat has absolutely tons of essential nutrients and vitamins, some of which can't be found in fruits and vegetables.

I wouldn't doubt that meat suffers from similar nutrient deficiencies. After all, livestock are fed from the same supply chain.

Cows are still fed grass. Over 90% of their diet even in grain-finished beef is grass. Chicken and pork I can't speak to as much.

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#47
post #29

Earlier quoted context omitted.

> Growing food has turned into an engineering problem where people think you solve it by investing the least possible resources into it. Our economic system optimizes for exactly this.

[deleted]

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Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#48
post #36
post #5

Read The Omnivore's Dilemma. Do it now.

not sure why this would get downvoted

It's not very helpful. Why do we need to read it? Why now? How is it related to this topic?

Those answers may be obvious to someone who's already read the book. To people not familiar with the book it's a cryptic imperative.

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#49
post #2

The link got that actual paper is much better than a sentence or two on LinkedIn. The paper’s title isn’t as catchy to put in nicely. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163803/ From my link: >It is important to note that the USDA mineral content of vegetables and fruits has not been updated since 2000, and perhaps even longer, given that the data for 1992 was not able to be definitively confirmed for this…

Hoe come HN so often spends the top comment correcting Some popular outlet? Why dont we get it straight from the source?

Re: Estimates that mineral levels in vegetables have dropped by up to 90% since 1914

#50

Earlier quoted context omitted.

If this is actually a problem, I'd much rather someone figure out which minerals need to go into the fertilizer mix (plus some downstream monitoring) than to assume that putting poop on the vegetables makes them wholesome.

Ten thousand years of agriculture is an assumption?

People have put up with a lot of shit -- literal and metaphorical -- over the last ten thousand years. I don't understand the assumption that it simply must be better than anything chemistry has to offer, and I find the aversion to measurement and control inherently suspicious.
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