Bottega Pistho
People buy organic for a simple reason: they would rather have less chemistry on the plate. Science, though, asks for data. And the data exist: the most solid answers come from three large meta-analyses published in peer-reviewed journals. They are worth reading for what they say, not for what we would like them to say.
Fewer residues, less cadmium
The meta-analysis by Mie and colleagues, published in the British Journal of Nutrition in 2017, reviewed the available literature on organic produce. Two findings stand out: conventional products are roughly four times more likely to contain detectable pesticide residues, and they show significantly higher cadmium levels, in the order of +48%.
Cadmium is no small detail. It is a heavy metal that accumulates in soils — partly through certain phosphate fertilisers — and passes from there into plants and the food chain. It causes no acute effects at dietary doses, but it is a contaminant that builds up over time, and reducing exposure is a sensible goal.
More antioxidants, with an agronomic explanation
The meta-analysis by Barański and colleagues (British Journal of Nutrition, 2014), covering 343 publications, found significantly higher antioxidant concentrations in organic produce: for some classes of phenolic compounds the difference reaches +69%.
The most credible explanation is agronomic, not miraculous: a plant not shielded by synthetic chemistry produces more defence compounds. For the plant, polyphenols are an immune system. Less external protection, more internal production. It is the same principle by which fruit grown under mild water stress is often more concentrated in aroma.
The counter-argument that has to be quoted
Here comes the part many articles skip. The study by Smith-Spangler and colleagues, published in the Annals of Internal Medicine in 2012, added a caveat that still stands: the nutritional differences measured do not, on their own, demonstrate a measurable long-term health impact.
That distinction matters. Measuring more antioxidants in a jar is not the same as proving that whoever eats it gets ill less often: that would need cohort studies running for decades, with variables that are hard to isolate, because people who buy organic also tend to smoke less, move more and eat more vegetables. The existing data are not enough to say organic "heals". They are enough to say that organic reduces exposure to what we would rather not eat. A more modest claim, but a defensible one.
The part no meta-analysis measures
Then there is something studies on nutritional composition do not capture: organic is first of all a farming method. It leaves the soil microbiologically more alive, protects pollinators, avoids pesticide drift into ditches and hedgerows, and in many cases preserves old varieties the conventional market abandoned because they yield less.
The numbers say this is no longer a minority choice: according to the latest ISMEA report, Italian household spending on organic products reached 3.96 billion euro in 2024, with volumes up 4.3% — faster than growth in value, a sign that the price gap with conventional is gradually narrowing.
What it means for your pantry
If the aim is to reduce exposure to residues, the logical priority goes to food eaten with the skin or that concentrates the raw material. Organic Sicilian sun-dried tomatoes concentrate roughly ten times the weight of fresh tomato: whatever is in the raw material, drying concentrates it along with the flavour. The same reasoning applies to an organic strawberry preserve — strawberries being among the most treated fruits in conventional farming — or to a organic wildflower honey, which mirrors a whole landscape.
If you would rather get your bearings without picking a category first, the Sicily Tasting Box brings together several certified products from the same supply chain.
The honest verdict
Buying organic today is less a measurable health decision and more a choice of farming model: which makes it no less reasonable, only more honest to describe. Anyone promising cures is selling something else. Anyone saying "fewer residues, more biodiversity, comparable nutrition with a few points in favour" is saying what the data allow.
In the same spirit we looked at whether honey is vegan and at the difference between natural and organic cosmetics: two cases where the short answer does not exist.
Sources
- Mie A. et al., Human health implications of organic food and organic agriculture, British Journal of Nutrition / Environmental Health, 2017
- Barański M. et al., Higher antioxidant and lower cadmium concentrations… a systematic literature review and meta-analyses, British Journal of Nutrition, 2014
- Smith-Spangler C. et al., Are organic foods safer or healthier than conventional alternatives?, Annals of Internal Medicine, 2012
- ISMEA, Bio in Cifre 2025
