15 juil. 2025

Is It Necessary to Buy Organic? Wash, Peel, or Pay More

In 2024, the Swiss Federal Food Safety and Veterinary Office analysed 405 samples of plant-based food collected in eleven cantons. One or more plant protection product residues were detected in 257 of them, or 63 %. Ten samples, or 2.5 %, exceeded a maximum residue level, and seven were non-compliant once measurement uncertainty was taken into account.

Those three figures capture the problem better than any argument. Finding a residue is ordinary. Exceeding the legal limit is not. And the gap between the two explains why the question “should I buy organic” has no single answer: it mixes a safety question, where the data are reassuring, an environmental question, where they are less so, and a budget question, which remains yours.

This page gives the Swiss figures product by product, what washing actually removes according to published trials, what peeling costs in nutrients, and what the research says when you look for an effect of organic food on health rather than on residue content.

What Swiss monitoring actually measures

The FSVO monitoring programme exists because a methodological problem was identified. The Plant Protection Products Action Plan adopted by the Federal Council on 6 September 2017 included a measure to analyse all available residue data. The FSVO concluded that these data were unsuitable, because they came from risk-based targeted sampling, therefore not representative, and from annual campaigns with no guaranteed continuity over time. A separate monitoring programme was created in 2019, with a sampling plan built on actual Swiss production and consumption.

Here are the 2024 results by product, from samples taken in retail outlets.

Product	Samples	With a detected residue	Above the legal limit
Cherries	31	31 (100 %)	1 (3.2 %)
Pears	29	28 (97 %)	0
Apricots	29	27 (93 %)	3 (10.3 %)
Apples	30	28 (93 %)	0
Strawberries	28	26 (93 %)	1 (3.6 %)
Carrots	30	25 (83 %)	1 (3.3 %)
Lettuce	30	24 (80 %)	0
Potatoes	30	19 (63 %)	0
Cauliflower	25	13 (52 %)	0
White cabbage	30	15 (50 %)	0
Wheat flour	30	14 (47 %)	1 (3.3 %)
Courgettes	30	7 (23 %)	0
Rapeseed oil	31	0 (0 %)	0
Sunflower oil	22	0 (0 %)	0
Total	405	257 (63 %)	10 (2.5 %)

Two lessons come out of that table, and neither appears in the lists of fruit to buy organic that circulate online.

The first: detection frequency and exceedance rate do not travel together. Cherries carry a residue in 100 % of cases and exceed the limit in 3.2 % of cases. Apricots carry one in 93 % of cases but exceed in 10.3 % of cases, the highest rate of the campaign. Courgettes, at 23 % detection, are the cleanest vegetable in the panel. Sorting your shopping by detection frequency therefore means sorting on the wrong indicator.

The second: the trend is drifting upwards. Samples containing at least one residue went from 54 % in 2020 to 53 % in 2021, 57 % in 2022, 59 % in 2023 and 63 % in 2024. Exceedances follow the same path, from 0.7 % in 2020 to 2.5 % in 2024. Part of that rise comes from improved analytical methods, which detect ever smaller quantities, but the increase is real and worth stating.

For 2025 the FSVO changed its sampling method to align with the EU programme: 153 samples were analysed, nearly two thirds of which, 64 %, contained no residue at all, and none exceeded the authorised maximum value.

At European scale the orders of magnitude match. In its report published in 2025, EFSA analysed 13,246 samples taken at random in 2023 under the EU-coordinated control programme: 99 % complied with EU legislation, 70 % contained no quantifiable residues, 28 % contained one or more residues within legal limits, and 2 % exceeded a limit, of which 1 % were non-compliant after accounting for measurement uncertainty. EFSA concludes that the estimated exposure poses a low risk to consumer health.

Organic versus conventional: what the analyses find, and what they do not

Two landmark reviews, apparently reaching opposite conclusions, actually say the same thing once you read what each one measured.

The meta-analysis published in 2014 in the British Journal of Nutrition covers 343 peer-reviewed publications. It finds markedly higher antioxidant concentrations in organic crops: phenolic acids higher by 19 % (95 % CI: 5 to 33), flavanones by 69 % (13 to 125), stilbenes by 28 % (12 to 44), flavones by 26 % (3 to 48), flavonols by 50 % (28 to 72) and anthocyanins by 51 % (17 to 86). It also finds pesticide residues occurring four times more frequently in conventional crops, along with significantly higher concentrations of cadmium, a toxic metal.

The systematic review published in 2012 in Annals of Internal Medicine examined 17 human studies and 223 composition studies. It concludes that the published literature lacks strong evidence that organic foods are significantly more nutritious, and that eating them may reduce exposure to pesticide residues and antibiotic-resistant bacteria. The risk of contamination with detectable residues is 30 percentage points lower for organic produce (95 % CI: -37 to -23), but the difference in risk of exceeding legal limits is small. Across the only three clinical studies available, no significant difference was found for eczema, wheeze, atopic sensitisation or symptomatic Campylobacter infection.

The gap between these two conclusions comes not from disagreement about the data but from the choice of variable. On residue content, the difference is clear and consistent. On nutrient content, it exists for phenolic compounds but stays buried in the variability of cultivar, ripeness and storage. On health outcomes measured in actual people, it has never been convincingly demonstrated.

That last point deserves the most attention, because it is the one advertising leans on hardest. The French NutriNet-Santé cohort, published in 2018 in JAMA Internal Medicine, followed 68,946 people and recorded 1340 first cancers. The highest quartile of organic consumption showed a hazard ratio of 0.75 (95 % CI: 0.63 to 0.88) against the lowest quartile, an absolute risk reduction of 0.6 %. That result travelled widely. A meta-analysis published in 2025 in Life, pooling the available studies, finds no difference at all: hazard ratio 0.93 (95 % CI: 0.78 to 1.12) for overall cancer, 1.01 (0.81 to 1.26) for breast cancer, 1.01 (0.93 to 1.10) for colorectal cancer.

A Danish cohort published in 2025 in the European Journal of Preventive Cardiology, covering 41,407 participants followed for a median of sixteen years with 5365 atherosclerotic cardiovascular events, finds a 6 % lower incidence among organic food consumers. A 6 % reduction in an observational cohort where organic buyers smoke less, move more and eat more vegetables remains very hard to pin on the organic food itself.

Washing: what it removes, and what it does not

Washing is the only free measure on this page, and the data are more favourable than commonly assumed, provided you know what is being measured.

A study published in 2025 in Foods tested household ingredients and four commercial products against a model pesticide, thiabendazole, applied to apples, quantified by surface-enhanced Raman spectroscopy and validated by liquid chromatography coupled to mass spectrometry. Soaking in 2 % corn starch followed by soaking in 5 % baking soda removed 91.78 % of the pesticide without a surfactant and 94.13 % with a non-ionic surfactant present. The best commercial product reached 95.9 %, but the authors raise concerns about its composition and conclude in favour of the homemade approach.

A study published in 2025 in BMC Plant Biology compared distilled water, 5 % vinegar and 5 % sodium bicarbonate on cherries treated with malathion and with boscalid combined with pyraclostrobin. Distilled water reduced residues the most, ahead of sodium bicarbonate and then vinegar. Bicarbonate treatments, however, caused greater mass loss and degraded fruit firmness.

Three practical consequences follow from these trials, and they do not all point where expected.

First, water alone already does most of the work, and it is the method that damages the produce least. Baking soda adds a measurable gain on some surface pesticides, but the result depends on the molecule and the fruit, and it is not free in quality terms.

Second, vinegar, the most widely recommended home remedy, comes last in the cherry trial. Its reputation outruns its results.

Third, and this is the decisive limit, none of these methods touches systemic pesticides. A systemic product is taken up by the plant and travels through its tissues: it is not on the fruit, it is in the fruit. No amount of washing removes it. Washing works on the surface fraction, and it also removes soil, debris and part of the microbial load, which remains a good reason to do it every time.

Peeling: the arithmetic is less favourable than it looks

Peeling removes the layer where contact residues are most concentrated. The gesture has a logic. What it costs is rarely quantified.

According to the ANSES Ciqual 2020 table, an apple with skin contains 6.2 mg of vitamin C and 1.40 g of fibre per 100 g, against 4.0 mg and 1.30 g for the same apple peeled: vitamin C drops by 36 %, fibre by 7 %. A cucumber with skin contains 8.2 mg of vitamin C per 100 g against 3.5 mg peeled, a 57 % loss. Potassium falls from 119 to 90 mg for the apple, and from 157 to 140 mg for the cucumber.

These losses are real but modest in absolute terms, because apples and cucumbers are not major vitamin C sources in the first place. The true cost of peeling lies elsewhere: it generates waste, it takes time, and it fails at precisely what it targets, since it does nothing against systemic molecules.

Two cases do justify peeling, and neither has anything to do with pesticides. Potatoes that have turned green or sprouted should be peeled generously with the green parts removed, because of solanine. And very muddy root vegetables benefit from scrubbing or peeling for straightforward hygiene reasons.

What the Swiss organic label guarantees, and what it does not

In Switzerland, organic farming is governed by the ordinance on organic farming, RS 910.18. Its article 3 sets out the principles: natural cycles and processes are taken into account, synthetic chemical auxiliary substances and ingredients are avoided, genetically modified organisms and products derived from them are banned from foods, animal feed, plant protection products, fertilisers and propagating material, ionising radiation is prohibited, and livestock numbers must be matched to the available land area.

Two rules in this ordinance bind more tightly than the public generally assumes. Article 6 sets out the whole-farm principle: the entire holding must be run under organic rules, not just the plot that carries the label. Article 8 imposes a two-year conversion period during which the holding counts as in conversion and the provisions of the ordinance must already be respected. You do not become organic by changing a label on 1 January.

What the label does not guarantee deserves equal clarity. It does not guarantee the total absence of residues: the FSVO monitoring covers conventional and organic foods, Swiss and foreign, precisely because both are concerned. It does not guarantee superior nutritional quality in the finished product, as the 2012 review shows. And it says nothing about the composition of a processed product: an organic pizza, biscuit or drink remains a processed product, whose salt, sugar and fat are judged on the nutrition declaration and not on the logo.

The environmental case, with its flip side

This is probably the ground where organic farming has the strongest data, and also the one where the trade-off is sharpest.

A meta-analysis published in 2022 in Ecology Letters quantified the trade-off between biodiversity and yield. Organic farming comes with a 23 % biodiversity gain, at a comparable cost in yield decline. The authors built a compatibility index to determine whether the biodiversity gain exceeds the yield loss: its overall value is close to zero, negative for cereal crops and positive for non-cereal crops. In other words, producing the same quantity organically requires more land, and that land comes from somewhere.

A meta-analysis of 32 studies published in 2024 in Heliyon documents another concrete aspect: organic practices increase weed density and diversity compared with conventional practices, which is consistent with forgoing synthetic herbicides and explains part of the extra labour cost.

This trade-off does not invalidate the choice of organic. It relocates it: the main benefit is local, falling on soil life, insects and water quality, rather than on the carbon footprint per kilogram produced, where the advantage is far more debatable.

The Swiss market in figures, and what it means for your basket

Switzerland is not a country where organic is marginal. According to figures published by Bio Suisse for 2025, organic food turnover reached 4.266 billion francs, the organic share of food retail stands at 12.3 %, and annual spending per inhabitant reaches 468 francs, the highest in Europe ahead of Denmark, Austria, Luxembourg and Sweden. Since 2023, Switzerland has held the largest organic market share in the world. At the end of 2025, 7467 holdings were producing under the Bio Suisse standard, and 18.4 % of the utilised agricultural area was farmed organically.

The breakdown by category is more instructive than the total. Organic eggs lead on market share at close to 28 %, followed by vegetables, salads and potatoes at 27 %, then bread at 24.6 %. Fruit and vegetables generate the highest organic turnover at 770 million francs. German-speaking Switzerland sells three times as much organic food as the French-speaking part.

What those figures mean for a vegetarian basket: the categories where organic supply is most developed, so where the price gap is best absorbed by volume, are exactly vegetables, potatoes, bread and eggs, which is to say the base of a meat-free diet. That is a concrete budget argument, and a better one than fruit rankings imported from across the Atlantic.

How to decide, concretely

If the budget forces a choice, here is the order that follows from the data above rather than from habit.

Start with what you eat every day in quantity, not with what frightens you. An apple a day weighs more in an annual exposure than a kilo of strawberries eaten in June. Bread, potatoes and staple vegetables are also the categories where Swiss organic supply is most mature.

Wash everything, every time, with water. It is free, it removes soil and part of the surface residues, and the cherry trial is a reminder that plain water already beats vinegar.

Do not peel on principle. Peeling costs vitamin C, up to 57 % for a cucumber, without touching systemic molecules. Keep it for very muddy roots and for green or sprouted potatoes.

Do not pay an organic premium on a processed product expecting nutritional quality. Read the nutrition declaration, which is mandatory, and it will tell you what the logo does not.

Buy in season where possible. It is the one criterion that aligns price, flavour and impact in the same direction, with no trade-off.

And accept that the basket need not be uniform. The most defensible combination, given the Swiss figures, is a mostly conventional basket, well washed and in season, with organic targeted at the foods you eat daily.

Common mistakes

Sorting your shopping by residue detection frequency. Cherries show 100 % detection and 3.2 % exceedance, apricots 93 % detection and 10.3 % exceedance. The two indicators do not rank products in the same order.

Believing a detected residue signals danger. Detection means the molecule is present above the laboratory’s limit of quantification, which has nothing to do with the maximum residue level. In 2024, 63 % of Swiss samples carried a residue and 2.5 % exceeded a limit.

Using fruit lists built for another market. Those rankings rest on national sampling, with different authorised substances and different farming practices. FSVO monitoring measures what is sold in Switzerland.

Relying on vinegar. In the cherry trial it comes behind distilled water and behind sodium bicarbonate.

Peeling to remove pesticides. Peeling does not reach systemic molecules, the ones circulating in plant tissue, and it removes a measurable share of vitamin C.

Equating organic with healthy on a processed product. The logo covers the agricultural production method, not the composition of the finished food.

Expecting a demonstrated health effect from organic food. The 2025 meta-analysis in Life finds no association with overall or site-specific cancer risk. The case for buying organic is regulatory and environmental before it is medical.

Depending on your situation

For a family with young children, the logic is to target the few foods eaten in large quantities relative to body weight, typically snack fruit and breakfast cereals, rather than spreading the budget across the whole basket.

For a pregnant person, the useful recommendations concern hygiene rather than the label: careful washing of all raw plant foods, because of micro-organisms rather than pesticides. Specific questions belong with a health professional.

For a tight budget, the order is clear: conventional seasonal vegetables, well washed and home-cooked, beat a partly wasted organic basket on almost every criterion. Waste cancels every trade-off.

For anyone buying direct from producers, the label question loses much of its weight: many small holdings farm with few treatments and no certification, since certification carries an administrative cost that volume does not always justify. A conversation with the grower gives information no logo provides.

The limits of this page

The composition data on peeling come from the Ciqual 2020 table, which is French and gives averages per product with no distinction of cultivar or production method. The gap between an early apple and a storage apple often exceeds the gap between peeled and unpeeled.

The 2024 FSVO results cover only fourteen foods, chosen on the basis of Swiss production and consumption. They say nothing about the rest of the aisle, notably exotic fruit and imported processed products.

The washing trials cited use one or two model pesticides applied under controlled conditions, on apples and on cherries. Removal rates of 91 to 94 % do not transfer mechanically to every molecule or every plant food.

Observational studies on organic food and health cannot separate the effect of organic eating from the lifestyle that comes with it. That is the main reason the NutriNet-Santé cohort and the 2025 meta-analysis disagree.

Finally, the Bio Suisse market figures come from an industry body, which does not invalidate their measurement but justifies reading them as sector data.

Frequently asked questions

Do Swiss fruit and vegetables contain pesticides? Often, yes, usually at compliant levels. In 2024, out of 405 samples analysed by the FSVO, 63 % contained at least one detectable residue and 2.5 % exceeded a maximum limit.

Does washing fruit remove pesticides? Partly. A 2025 trial in Foods achieved 91.78 % removal of a model pesticide from apples using a starch soak followed by a baking soda soak. No washing acts on systemic pesticides taken up inside the plant.

Is vinegar effective for washing fruit? Less so than water in the available trials. On cherries, the 2025 study in BMC Plant Biology ranks distilled water ahead of sodium bicarbonate, which in turn beats vinegar.

Should I peel fruit to be on the safe side? It is not the best trade-off. Peeling an apple removes 36 % of its vitamin C according to Ciqual, and a cucumber 57 %, without reaching systemic molecules.

Is organic food better for health? On residue content the difference is established: the risk of detectable contamination is about 30 percentage points lower according to the 2012 review in Annals of Internal Medicine. On measured health outcomes, the 2025 meta-analysis in Life finds no association with cancer risk.

Does organic food contain more nutrients? For phenolic compounds, the 2014 meta-analysis in the British Journal of Nutrition finds significant gaps, up to 69 % for flavanones. For common vitamins and minerals, the estimates are highly heterogeneous and the 2012 review does not conclude in favour of nutritional superiority.

What exactly does the Swiss organic label guarantee? Ordinance RS 910.18 requires avoiding synthetic chemical inputs, bans GMOs and ionising radiation, requires the whole holding to be farmed organically under article 6, and imposes a two-year conversion under article 8. It does not guarantee the absence of all residues.

What share of the Swiss market is organic? 12.3 % of food retail in 2025 according to Bio Suisse, for 4.266 billion francs of turnover, with higher shares for eggs (close to 28 %), vegetables, salads and potatoes (27 %) and bread (24.6 %).

Is organic better for the environment? On biodiversity, yes: the 2022 meta-analysis in Ecology Letters measures a 23 % gain. That gain comes with a comparable yield decline, which shifts the question towards the land area needed to produce the same quantity.

Where to go next

To understand what certifications actually cover, the article on Swiss labels: organic, Demeter, Bourgeon sets out the standards.

On seasonal and local buying, see adapting vegetarian meals to the seasons and eating local in winter, which deal with real availability calendars.

On Swiss organic pulses, the sector where the price premium is best documented, see eating local: a focus on Swiss organic legumes and cooking local legumes to reduce your carbon footprint.

Since waste cancels every budget trade-off, see storing fruit, vegetables and pulses properly and anti-waste practices. For trimmings still worth using, see pesto from vegetable tops.

Finally, on the economics of one local supply chain taken as an example, understanding the local tofu economy in Switzerland shows how a price gap is built.