This article is part of our ongoing coverage of the 2025-2026 formula safety events. For the full picture connecting the ARA oil recall, the ByHeart botulism outbreak, and the HiPP Austria tampering incident, see our main formula recall coverage.
What is ARA,
and why is it in formula?
Arachidonic acid (ARA) is an omega-6 long-chain polyunsaturated fatty acid. It sounds clinical, but the simple version is this: ARA is present in breast milk at a relatively fixed level, and it plays a documented role in infant brain development, immune function, and the formation of cell membranes. It is not a minor ingredient, it is one of the two main fatty acids, alongside DHA, that formula manufacturers have been adding to their products for decades in an attempt to more closely match breast milk composition.
The human body can synthesise ARA from linoleic acid, a common dietary fat. But infants cannot make enough of it through this conversion pathway to meet their metabolic needs. That makes dietary ARA, from breast milk or, for formula-fed babies, from supplemented formula, important during the first year of life when brain and nervous system development is most rapid.
Both ARA and DHA are present in breast milk worldwide at relatively stable levels, with ARA typically equalling or exceeding DHA. Research consistently shows that infants cannot maintain adequate ARA levels from synthesis alone, and that ARA supports not just brain development but immune function, vascular health, and inflammation regulation. The EFSA recommends 140mg of ARA per day for infants under six months, alongside 100mg of DHA.
The controversy around ARA in formula is not really about whether ARA belongs there, the evidence for its importance is strong. The controversy is about how it is made and sourced. ARA does not occur naturally in plants or grains. To add it to formula, manufacturers must produce it industrially, typically by fermenting specific fungi. The fungal oil must then be extracted, purified, and added to the formula. Each step in that process is a point of potential contamination or quality failure.
The 2026 Nestlé recall:
what actually happened.
In late November 2025, Nestlé detected low levels of cereulide, a heat-stable toxin produced by certain strains of Bacillus cereus bacteria, in infant formula produced at its Nunspeet facility in the Netherlands. What followed became what Austrian authorities described as the largest product recall in Nestlé's history.
Contamination begins
Analysis of 65 ARA oil batches from the Chinese supplier later revealed contamination had begun as early as October 2024, persisting throughout 2025 with the highest concentrations in July 2025 deliveries.
Nestlé identifies the problem
Cereulide is detected during routine quality monitoring at the Nunspeet plant. Nestlé informs Dutch food safety authorities and the European Commission on December 10, and initiates a "silent withdrawal" of 25 batches across 16 European countries.
Source traced to ARA oil supplier
On December 24, Nestlé traces the contamination to ARA oil supplied by Cabio Biotech, a Chinese company. All products using ARA oil from this supplier are immediately blocked. Nestlé alerts other manufacturers on December 30.
Global recall expands across continents
The public recall expands globally, affecting brands including SMA, Beba, Guigoz, and Alfamino. Danone and Lactalis, which had also sourced from the same supplier, begin their own recalls. Hochdorf, a Swiss manufacturer, joins the affected list. Over 800 products across 10+ Nestlé factories are affected. FoodWatch files a criminal complaint over delayed public disclosure.
EFSA sets new cereulide limits
On 2 February 2026, EFSA introduced new guidance establishing an acute reference dose of 0.014 μg/kg bodyweight for cereulide in infants, corresponding to a product action limit of 0.43 ng/g. Nestlé states it had already been applying an internal limit of 0.2 ng/g, stricter than the new regulatory standard. The EU then placed emergency import restrictions on all Chinese ARA oil shipments from 26 February.
WHO confirms 99 countries now affected
The WHO Disease Outbreak News of 13 March 2026 confirms the recall has reached 99 countries across six WHO regions, up from 60 in January. 144 suspected and confirmed gastrointestinal illness cases have been reported across 10 countries. Belgium confirms 8 laboratory-verified cases. The WHO also notes that cumulative exposure over time may be an under-studied risk factor and that the Chinese supplier has not yet provided full ingredient traceability data.
Cereulide is not a standard bacterial contamination. It is a heat-stable toxin, which means it cannot be destroyed by boiling water, standard sterilisation, or cooking. Once present in formula, it cannot be removed by preparing formula in the normal way. It causes nausea and vomiting typically within 30 minutes to six hours of ingestion. In infants, dehydration from repeated vomiting requires hospitalisation.
Why did this reach
so many brands at once?
The scale of the recall was not the result of a failure unique to Nestlé. It was the result of industrial infant formula's fundamental structure: a small number of global ingredient suppliers serving the world's largest formula manufacturers simultaneously.
ARA oil is a specialised ingredient. It cannot be substituted easily or quickly, formula manufacturers need ARA with precise specifications covering fatty acid profile, food safety, and formulation performance. There are only a handful of major ARA suppliers globally, and several of the world's largest formula manufacturers were sourcing from the same Chinese company, Cabio Biotech, at the same time.
"You can't just swap one ingredient for another because we're dealing with precise formulations. You need the exact amount and the same specifications, and that's often the biggest challenge, finding a substitute that matches perfectly."
Senior food industry source, DairyReporter, January 2026ARA oil had also been classified by the industry as a "low-risk" ingredient, meaning it was subject to routine testing but not the more rigorous testing protocols applied to higher-risk inputs like raw milk. This classification, which had seemed reasonable given the ingredient's track record, meant the contamination went undetected for over a year, from at least October 2024 until late November 2025.
The transparency question:
what Nestlé knew and when.
Perhaps the most concerning dimension of the recall was not the contamination itself, but what FoodWatch International described as a "serious breakdown in rapid traceability and risk communication." According to French authorities, potentially affected products had been on sale as early as October 2025. Several European countries, including France, Finland, and Denmark, initiated recalls in mid-December. Yet public recall announcements in the Netherlands, Belgium, Germany, and Ireland did not come until the first week of January 2026, nearly a month later. The ARA oil recall is one part of the broader 2025-2026 formula safety story, alongside the ByHeart botulism outbreak and the HiPP Austria tampering event, each with a different mechanism but connected through the common thread of supply chain oversight.
Nestlé conducted what the industry calls a "silent withdrawal" over the Christmas period, removing products from shelves without public announcement, before the global recall became public. FoodWatch filed a criminal complaint, alleging failures in traceability and delayed public warning obligations. The organisation also called for the unnamed supplier to be publicly identified, which Nestlé initially refused to do.
Contamination began in October 2024. Nestlé identified it in November 2025, over a year later. Authorities were informed in December 2025. A public global recall did not happen until January 2026. During this time, affected formula continued to be sold to parents who had no way of knowing. For infant formula, a product consumed several times daily by the most vulnerable population, this timeline is not acceptable by any standard of consumer safety.
What this means for
how you evaluate formula.
The recall does not mean ARA itself is unsafe. ARA is a normal, beneficial component of breast milk, and adding it to formula at appropriate levels is scientifically sound. The problem was not the ingredient, it was the sourcing, the supply chain, and the response. Understanding the difference matters for how you think about formula choice.
Several questions are now worth asking about any formula you are using or considering:
Where does the ARA come from?
The cleanest brands source ARA oil from verified, audited suppliers and disclose those sourcing relationships. DSM-Firmenich, a Dutch company and one of the original pioneers in commercial ARA and DHA production, explicitly confirmed its products were not affected by the recall, a meaningful distinction. Brands that disclose their ingredient suppliers are meaningfully more transparent than those that do not.
How is it extracted?
The standard industrial process for extracting ARA from fungi has historically involved hexane, a petroleum-derived solvent. Hexane residues in formula were a point of concern even before this recall. Cleaner extraction methods exist and are used by some suppliers. The cleanest brands can tell you the extraction process used for every fat in their formula. Most cannot or will not.
This is one of the most important and least-known protections offered by the EU organic certification. Under EU Organic Regulation 2018/848, organic processed food may not be processed using chemical solvents. Hexane is a chemical solvent. This means any formula carrying the EU Green Leaf organic logo cannot legally use hexane-extracted ARA or DHA oil in its production. By contrast, US USDA Organic standards still permit hexane extraction, meaning organic-labelled US formulas may still contain hexane-extracted fats. When you see the EU Green Leaf on a European formula, the prohibition on chemical solvents in processing is one of the concrete safety guarantees behind it.
What does the brand test independently?
The Nestlé recall exposed that ARA oil had been treated as a low-risk ingredient requiring only routine testing. Independent third-party testing of finished formula, rather than relying solely on manufacturer or supplier testing, provides an additional layer of assurance. Very few conventional formula brands publish third-party testing results. Several organic brands do.
Which formulas
were and were not affected.
The recall centred on mainstream European and global formula brands manufactured by Nestlé, Danone, and Lactalis. Organic formula brands, specifically those with tighter ingredient sourcing policies and smaller, more auditable supply chains, were not affected. This was not coincidence.
800+ products across 10+ factories. Sourced ARA oil from Cabio Biotech. Recall now spans 99 countries per WHO. All recalled batches now withdrawn.
Products recalled in Ireland, UK, Germany, and Singapore after sourcing from the same affected supplier. Shares fell approximately 11% in the month following the announcement.
Six lots of Picot infant formula recalled in 18 countries. Hochdorf, the Swiss manufacturer, also joined the affected list. Affected batches had been on sale since January 2025 with expiration dates up to March 2027.
Kendamil UK and US products were not recalled. Health Canada recalled specific Kendamil Whole Milk Infant Formula batches sold at Costco Canada in February 2026, linked to the same cereulide contamination.
European organic brands not named in any cereulide recall notice. Tighter supply chain requirements, shorter sourcing paths, and different ARA suppliers kept them outside the affected supply chain.
Organic formula brands are not automatically safe from supply chain contamination, no formula can guarantee that. But the European organic brands in our formula guide were not named in any cereulide recall notice. Stricter ingredient sourcing requirements, European manufacturing standards, and smaller, more auditable supply chains create a different risk profile to the globalised supply chains of the major conventional manufacturers. This recall is a concrete illustration of why supply chain transparency matters, not just ingredient certification.
The bottom line:
should you be worried?
If your baby's formula was not recalled, there is no ongoing risk from this specific contamination, Nestlé and the other affected manufacturers have replaced the contaminated supply and resumed production. The recalled batches have been withdrawn.
The longer-term concern is structural. This recall revealed that the global infant formula industry is more concentrated and interdependent than most parents realise. A single ingredient supplier in one country can trigger a recall affecting hundreds of products in nearly a hundred countries simultaneously. The classified risk level of that ingredient, "low risk", was based on its track record, not on continuous independent testing. And the timeline between contamination and public recall was over a year.
ARA itself is not the problem. It belongs in formula, and removing it would likely cause more harm than the contamination event itself. The problem is the supply chain structure, the classification of ingredient risk, and the transparency of disclosure when things go wrong.
For parents choosing formula, the questions this raises are practical ones: Does the brand you use publish its ingredient suppliers? Does it conduct independent third-party testing of the finished product? Does it have a track record of transparent recall communication? These are harder questions to answer than reading a certification label, but they are the right questions.
Ingredient transparency, brands that name their ARA and DHA suppliers. Third-party finished-product testing, not just supplier certifications. A manufacturing supply chain that is as short and auditable as possible. European-manufactured organic formulas with verified ingredient sourcing represent the highest current standard. Our formula guide covers the brands that meet this bar and explains in detail how each one handles ingredient sourcing.