Why Food Is Less Nutritious Than It Used to Be (And Why Eating Organic Didn't Fix How You Feel)

You buy the organic spinach. You shop the perimeter. You gave up the seed oils and the sodas and the boxed cereal, and some part of you expected a reward for that. Instead you are still cold at 3pm, still foggy after lunch, still hungry two hours after a meal that should have held you. And somewhere in the back of your mind is a question you feel slightly stupid asking out loud: if I am eating this well, why do I feel like this?

There is a real answer, and it has two halves. Most articles give you one of them.

The half you have probably heard is that food is less nutritious than it used to be. That part is true, and the evidence for it is better than the skeptics allow. But it is only the supply side of the problem. The second half, the one that almost nobody writes about, is that your ability to extract minerals from food is itself a metabolic function. It runs on energy. When that function is impaired, you can eat immaculate food and absorb a fraction of it.

That is why the organic groceries did not deliver what you expected. You upgraded the supply and left the demand side broken. The good news is that the supply side takes a farmer five to ten years to repair, and the demand side can start moving in a matter of weeks.

Why Food Is Less Nutritious Than It Used to Be

In 2004, Donald Davis and colleagues at the University of Texas compared USDA nutrient data for 43 garden crops between 1950 and 1999. Same agency, same crops, fifty years apart. Calcium, phosphorus, iron, riboflavin, and vitamin C had all declined, with drops ranging from about 6 to 38 percent depending on the crop and the nutrient.

That study gets cited constantly, and it also gets attacked constantly. The criticism is fair on its own terms: analytical methods changed between 1950 and 1999, crop varieties changed, and samples came from different regions and different laboratories. Comparing a 1950 assay to a 1999 assay is not clean science, and anyone who waves that objection away is not arguing honestly.

So here is why the conclusion survives anyway.

First, it replicated. A 2022 analysis in the International Journal of Food Sciences and Nutrition ran the same question against UK food composition data from 1940 to 2019, a different country, a different dataset, and a different research team. The mineral declines showed up again.

Second, and more importantly, we now have the mechanism. In 2014, Irakli Loladze published work in eLife showing that elevated atmospheric CO2 systematically shifts the mineral profile of plants. More CO2 means more carbohydrate synthesis. The plant builds more sugar and starch without a matching increase in mineral uptake, so the minerals get spread thinner through a larger mass of tissue.

This is the piece that dismantles the methodology objection. Nutrient dilution is a ratio, not an absolute measurement. It does not matter whether your 1950 spectrometer read iron slightly differently than your 1999 spectrometer. What matters is that the same plant now carries more starch per milligram of zinc. Changing your measuring stick does not change a ratio.

Add the agronomy on top of it. We spent seventy years breeding crops for yield, size, and shelf life, and fertilizing heavily with nitrogen, phosphorus, and potassium. We got exactly what we selected for. Bigger, faster, wetter, starchier plants. Nobody selected for zinc.

I want to be precise about what this does and does not mean, because the doom version of this story is wrong and it makes people paranoid instead of effective. Your vegetables were not poisoned. They were inflated. The food supply went through something structurally identical to monetary inflation: the number of units went up, and the value packed into each unit went down. A carrot is still a carrot. It just buys less than a 1950 carrot did.

That reframe matters, because it tells you the fix is not fear. It is density.

Does Regenerative Farming Actually Reverse It?

It appears to, and the best evidence is the study Robert Malone cited in his recent talk on this subject. David Montgomery's team at the University of Washington published a 2022 comparison in PeerJ that paired regenerative and conventional farms growing the same crops on the same soil types, sometimes in adjacent fields.

The regenerative fields produced crops with higher mineral and phytochemical content. The finding worth sitting with is that the differences did not track total soil mineral levels. They tracked soil health scores: organic matter, microbial activity, aggregate structure. The regenerative soil was not necessarily richer in raw mineral content. Its biology was working again.

That distinction is the whole argument. Soil is not a warehouse of minerals. It is a living delivery system, and the delivery system is what broke.

You Are Probably Not Overeating. You May Be Under-Mineralized

Here is where this stops being an agriculture story and starts being a story about your body.

If the mineral content per calorie has fallen, then hitting your mineral requirements now costs you more calories than it cost your grandmother. Your appetite does not measure calories. It measures whether you got what you were looking for.

There is a serious body of research on this. Raubenheimer and Simpson's protein leverage hypothesis, reviewed in Philosophical Transactions of the Royal Society B in 2023, proposes that humans eat toward a protein target with more priority than an energy target. Dilute the protein in the diet and total energy intake rises, because people keep eating until the protein requirement is met. The same logic extends to micronutrients that the body monitors.

Kevin Hall's 2019 inpatient trial in Cell Metabolism is the controlled version of this. Subjects lived in a metabolic ward and ate either ultra-processed or minimally processed food, with the diets matched for calories, sugar, fat, fiber, and macronutrients. On the ultra-processed diet, people ate about 500 more calories per day and gained weight. Matched on paper, wildly different in practice.

Something about the food itself was driving intake upward, independent of its macronutrient label.

Now hold that next to the dilution data and a fairly uncomfortable picture forms. We diluted the mineral content of whole foods through the soil and the breeding program. Then we took the diluted crop, stripped the bran and germ, and sold the starch back as a fortified product with a handful of synthetic vitamins sprayed on. At every step the ratio of cofactors to calories fell.

A body that keeps eating in that environment is not weak. It is searching. The hunger is a foraging signal, and it does not switch off just because the calorie count is met.

This is also, quietly, the strongest argument against the advice most people get. Telling an under-mineralized person to eat less food is telling them to search harder with less to search through.

From Depleted Soil to a Slowed Thyroid

The minerals that fell are not incidental. They are the physical hardware your mitochondria are built from.

Cellular energy production runs through the electron transport chain, a sequence of protein complexes that pass electrons down a line and use the resulting proton gradient to make ATP. Nearly every station on that line is a metal.

Iron sits in the iron-sulfur clusters of Complexes I, II, and III. Copper sits at Complex IV, cytochrome c oxidase, which is the final and rate-limiting step where electrons are handed to oxygen. Magnesium is required for ATP itself, since the biologically active form of the molecule is magnesium-ATP. Manganese runs the mitochondrial antioxidant enzyme that protects the whole apparatus from its own exhaust. Zinc is a cofactor for hundreds of enzymes, including the ones that make stomach acid.

And then there is selenium, which is where the story gets specific.

Your thyroid gland mostly secretes T4, which is an inactive prohormone. It does almost nothing until an iodine atom is removed and it becomes T3, the hormone that actually sets your metabolic rate. That conversion is performed by a family of enzymes called deiodinases, and every one of them is a selenoprotein. Selenium is not a helpful addition to that reaction. It is a structural component of the enzyme.

When selenium is low, the conversion falters. A 2021 study in Clinical Pediatric Endocrinology examined patients with documented selenium deficiency and found exactly the signature you would predict: an elevated free T4 to T3 ratio. Plenty of raw material, not enough activation.

Read that chain again, because it is the point of this entire article. Tillage and fertilization suppress the fungal networks that ferry selenium and iodine into plant roots. Less selenium reaches the crop. Less selenium reaches you. Less selenium means fewer functional deiodinase enzymes. Fewer deiodinases means less T3. Less T3 means a lower metabolic rate, colder hands, and a body temperature that sits below where it should.

Dirt to thyroid, in five steps. If you want the downstream version of this, our piece on what your body temperature reveals about your thyroid covers what happens when that signal falls and your labs still read normal.

The Half Nobody Writes About: You Have to Absorb It

This is where the standard soil article ends and where the interesting problem begins.

Digestion is expensive. The liver and gastrointestinal tract together make up a small fraction of your body weight while accounting for roughly a quarter of your resting energy expenditure. Pound for pound, they are among the most metabolically costly tissue you own. That makes digestion a luxury purchase, and when cellular energy is scarce the body throttles it, the same way a struggling household cancels subscriptions before it stops paying rent.

So consider what happens once your T3 has fallen.

Stomach acid drops. T3 is a regulator of hydrochloric acid secretion, and reduced gastric acid output in hypothyroidism has been documented in the clinical literature since at least the 1960s. This matters more than people realize, because minerals in food are bound to proteins. Acid is what liberates and ionizes them. Without enough acid, the magnesium and zinc and iron you ate pass through still attached to the food matrix and leave the body unabsorbed. You genuinely ate the mineral. You never received it.

Motility slows. In a 2009 scintigraphy study, researchers measured esophageal transit and gastric emptying in 30 women with primary hypothyroidism against 10 healthy controls. Mean esophageal transit time went from about 24 seconds in controls to about 53 seconds in the hypothyroid group. Gastric emptying went from roughly 30 minutes to 49 minutes. It is a small study and deserves to be read as one, but the direction is consistent with the broader clinical picture: food sits longer, the between-meal cleanup wave weakens, and bacteria drift upward into territory they should not occupy.

Enzymes lose activity. Digestive enzymes are temperature-sensitive proteins calibrated to a body running near 98.6 degrees. Run the system cold and you lose a meaningful fraction of enzymatic activity. Cold is not just a symptom of a slow metabolism. It is a mechanism that makes digestion worse.

The wrong bacteria move in. When transit slows and acid falls, the small intestine loses two of its main defenses against colonization. A 2026 study in the Journal of Clinical Endocrinology and Metabolism found hypothyroidism associated with increased risk of small intestinal bacterial overgrowth and with altered duodenal microbial populations. Bacteria competing for nutrients in the stretch of gut where you absorb minerals is not a helpful arrangement.

Now close the loop. Poor mineral intake impairs T4 to T3 conversion. Low T3 shuts down acid, slows motility, reduces enzyme activity, and lets bacteria colonize the absorptive stretch of intestine. A gut in that state cannot absorb selenium, zinc, copper, or iron. Which further impairs T4 to T3 conversion.

That is a self-reinforcing loop, and it explains the thing you came here confused about. You upgraded your groceries and your body did not notice, because the machinery that turns groceries into you was the part that was broken.

There is a fast, common, entirely pharmaceutical way to enter this same loop from the other direction, which is chronic acid suppression. If you take a proton pump inhibitor, read our piece on what PPIs do to nutrient absorption, because that drug removes the exact step this section is about.

The Biospark Approach: Fix the Receiver, Then Upgrade the Signal

Most nutrition advice is supply-side only. Buy better food. It is not wrong, it is just incomplete, and incomplete advice is why so many diligent people plateau.

We work the problem from both ends, and we start with the end that moves faster.

Restore the absorption machinery first. That means supporting cellular energy production so the body stops treating digestion as optional. Adequate carbohydrate to keep liver glycogen stocked and T4 to T3 conversion running, enough salt, enough protein balanced with glycine, and enough total food. Undereating is not a neutral act here. It lowers T3, which lowers absorption, which lowers your effective nutrient intake below what your food label claims. Our article on how "healthy eating" shrinks your organs covers what sustained restriction actually does.

Then raise density instead of volume. Since the mineral-per-calorie ratio fell, the correction is foods that concentrate minerals rather than dilute them, and this is where animals do work you cannot do yourself. A ruminant grazes acres of forage, filters it through a rumen, and delivers the concentrated mineral fraction in a gallon of milk. Shellfish accumulate trace minerals from an entire water column. Liver is the organ whose literal job is storing micronutrients. None of these require you to own land or wait a decade for soil biology to recover.

This is also why the plant-forward version of this advice tends to backfire in exactly the population reading this article. Depleted soil hits plant foods hardest, and what minerals remain in grains, nuts, legumes, and high-oxalate greens are partly bound by phytate and oxalate before you ever get to them. Spinach is the classic case: real calcium on the label, largely unavailable in practice because it is locked to oxalic acid. In a person with low stomach acid, that gap widens further.

Measure the thing that actually tracks the fix. Body temperature and resting pulse tell you whether the metabolic rate is moving. Lab panels are useful, but a TSH inside the reference range has told a very large number of cold, tired people that nothing is wrong.

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Nutrient Density Support in Reading and Berks County, PA

There is a local wrinkle to this that most Pennsylvania residents never hear about. Pennsylvania sits inside a genuinely selenium-poor soil band. The soils of the northeastern United States formed largely from sedimentary parent rock that predates the geological selenization of the continent, which is why Pennsylvania is grouped with New York, New Jersey, Maryland, West Virginia, and New England on selenium distribution maps, in contrast to the selenium-rich soils of the Great Plains.

That is not a small footnote for a region where so much food is grown and eaten locally. If you live in Berks County and eat produce raised on Berks County soil, the selenium content of your diet reflects the geology under your feet. Given that selenium is the structural cofactor for the enzymes that convert T4 into active T3, this is a plausible contributor to why so many people in this area carry hypothyroid symptoms alongside lab work their physician calls normal.

The upside is that southeastern Pennsylvania is unusually well positioned to solve it. Berks and Lancaster counties remain working farm country, Pennsylvania permits the sale of raw milk from licensed dairies, and pastured eggs and grass-fed meat are available here in a way they are not in most of the country. The concentrated animal foods that bypass the soil problem are close by.

Biospark Health serves patients throughout Reading, Wyomissing, Lancaster, Downingtown, Allentown, West Chester, and the surrounding southeastern Pennsylvania region, with both in-person and virtual consultations available.

Frequently Asked Questions

Are vegetables less nutritious now than they were 50 years ago?

On a per-gram basis, the evidence says yes for several minerals and vitamins, though the size of the decline varies by crop and nutrient. Davis's 2004 USDA analysis found declines of roughly 6 to 38 percent across 43 garden crops between 1950 and 1999, and a 2022 UK analysis covering 1940 to 2019 found the same pattern in an entirely separate dataset. The mechanism is dilution rather than contamination: modern crops grow larger and starchier without a proportional increase in mineral uptake, so each gram carries less. Vegetables are still worth eating. They are simply not the mineral source they are widely assumed to be.

Was food actually healthier 100 years ago?

In terms of mineral density per calorie, likely yes. In terms of overall safety and supply, clearly no. A century ago people dealt with contaminated milk, seasonal scarcity, and outright deficiency diseases. The honest framing is that we solved calorie availability and food safety brilliantly, and we did it using methods that traded away nutrient density. That is a real trade, not a conspiracy, and recognizing it lets you correct for it deliberately instead of romanticizing a past that had its own problems.

If I eat organic, am I protected from this?

Only partially. Organic certification restricts synthetic inputs, but it does not require the soil biology practices that the Montgomery data associated with higher nutrient density, and it does nothing about the CO2-driven dilution effect or about breeding for yield. More to the point, organic produce does not address the absorption side at all. If your metabolic rate is low and your stomach acid is down, organic vegetables are subject to the same absorption failure as conventional ones.

What are the effects of mineral deficiency on the body?

Because minerals are cofactors rather than fuel, deficiency tends to show up as diffuse energy failure rather than as one clean symptom. Low selenium impairs T4 to T3 conversion. Low copper limits cytochrome c oxidase, the step where mitochondria use oxygen. Low magnesium limits ATP function directly. Low iron degrades oxygen transport and the electron transport chain. The result is fatigue, cold extremities, poor exercise recovery, brain fog, and a metabolic rate that runs below where it should, which is precisely the symptom cluster that most often gets returned to the patient as normal labs.

How long does it take to fix this?

The two halves run on completely different clocks, and that asymmetry is the most useful thing in this article. Rebuilding soil to the point of measurably improved crop mineral density took five to ten years in the Montgomery work. Your absorption machinery is far faster. Body temperature and digestive function often begin shifting within weeks of consistent metabolic support, because you are restoring the function of tissue you already have rather than rebuilding an ecosystem.

The Part You Control

Malone is right that the soil story is real and that the repair is slow. He is also right that no garden fixes farm policy. But there is a conclusion hiding in his own data that he does not quite draw.

If soil repair takes five to ten years and you do not own a farm, then the supply side is not where your leverage is. Your leverage is on the receiving end. The absorption machinery is yours, it is currently underperforming for reasons that are well understood, and it responds on a timescale of weeks.

So the sequence is backwards from how it is usually taught. Do not start by perfecting the food and hope your body catches up. Start by restoring the metabolic rate that lets your body extract what food already offers, then raise the density of what you feed it. Warmth first, then groceries.

The spinach was never the problem. The problem was that nobody told you absorption is a metabolic act, and that a cold, energy-starved body cannot perform it no matter how well you shop.

Learn more about the Biospark approach to metabolic health →