Ultra-processed food arrives in babies' diets earlier than most parents realise

What happened

Researchers following a group of babies in Denver, Colorado have found that ultra-processed foods appear in children's diets very early, during the months when solid food is first being introduced. The study, published in the journal Nutrients and reported on 14 September 2026, followed 114 healthy infants. Researchers recorded what the babies were eating as they moved from milk alone to family food, a stage health professionals call complementary feeding. The main finding was about what came alongside those foods. Babies who ate more ultra-processed food took in more added sugar and more salt at nine months and at twelve months. Interestingly, the researchers did not find a consistent link between ultra-processed food intake and how the babies grew between five and twelve months. Weight and length did not clearly track with it. 'Ultra-processed' is a term from a food classification system called NOVA. It does not simply mean unhealthy, and it does not mean unsafe. It refers to foods that have been through substantial industrial processing and typically contain ingredients you would not find in a home kitchen: emulsifiers, colourings, flavourings, sweeteners and similar additives. Plenty of everyday products fall into it, including many baby snacks, sweetened yoghurts, flavoured pouches and shop-bought biscuits.

Why this matters

The first year of eating is a small window with a long shadow. Taste preferences are partly learned, and they start forming early. Babies are born liking sweetness, and repeated exposure to sweet and salty flavours during weaning appears to shape what children accept later. Vegetables, which are often bitter, usually take repeated tries before a baby accepts them. If the competing option is a sweetened pouch, the vegetables can lose. Salt matters for a more immediate reason. Babies' kidneys are still developing and cannot handle much sodium. NHS guidance is clear that babies under one should not have salt added to their food, and that salty foods such as stock cubes, gravy, bacon and many processed products should be avoided. Added sugar matters for teeth as well as weight. In England, tooth decay is one of the most common reasons young children are admitted to hospital, and it is almost entirely preventable. There is also a fairness point. The study's own authors note that the families in their sample were mostly higher income and highly educated. In the UK, ultra-processed food makes up a larger share of the diet in poorer households, partly because it is cheaper, keeps longer and needs less equipment and time to prepare. Telling parents to cook from scratch ignores the reasons many cannot.

What the evidence actually says

This is a small study and the researchers are upfront about its limits. There were 114 babies, all healthy, all from one metropolitan area in the United States. The group was predominantly White and included a high proportion of families with higher incomes and higher levels of maternal education. That is not a picture of the general population, in America or here. Breastmilk and formula were not included in the dietary analysis, and total energy intake was not quantified. Both of those matter when you are trying to understand a baby's whole diet, since milk is still the largest part of it at nine months. And it is observational. It shows that babies eating more ultra-processed food also took in more sugar and salt, which is not exactly surprising, since that is often where the sugar and salt are. It does not show that ultra-processed food caused any harm. Notably, growth was not consistently affected, which is worth saying plainly rather than glossing over. So the fair summary is modest: this study is a useful measurement of what is actually going into babies' bowls at a formative age, and a reminder that the sugar and salt content is the concrete thing to watch. It is not proof that a pouch of fruit puree will damage your child. It is also worth resisting the idea that 'ultra-processed' is a simple line between good and bad. Wholemeal supermarket bread is classified as ultra-processed. So is baked beans in some classifications. The sugar and salt numbers on the label are a more useful guide for a baby than the category.

Qurexa perspective

We deliver groceries as well as prescriptions, so we see a fair number of weekly shops. There is one small practical advantage to ordering food online that is worth flagging, because it works in parents' favour. When you shop online you can read the full ingredients list and the nutrition panel before you buy, without standing in an aisle with a fractious toddler and squinting at small print. Comparing two baby snacks on salt and sugar per 100g takes about ten seconds on a screen and is genuinely difficult in a shop. That is a small thing. But with weaning, small things repeated daily are most of the story. We would also say honestly that not every family has the time, money or kitchen to cook everything from scratch, and nobody should feel guilty about using convenience food for babies. The realistic goal is not purity. It is checking labels, keeping added salt out, and making sure plain vegetables get offered often enough to stand a chance.

Practical advice

NHS guidance in the UK is well established and worth following. Start solid food at around six months, when your baby can sit up, hold their head steady and bring food to their mouth. No added salt before one year. Do not add salt to cooking, and avoid stock cubes, gravy granules, bacon, sausages, crisps and takeaways. Check labels: anything over 1.5g of salt per 100g is high. No added sugar and no honey before one year. Honey can carry bacteria that cause infant botulism, a rare but serious illness in babies under twelve months. Offer vegetables early and repeatedly, including bitter ones like broccoli and spinach. It can take ten or more tries before a baby accepts a new flavour. That is normal, not rejection. Use pouches sparingly and not as the main way of eating. Sucking sweet puree from a spout gives a baby little practice at chewing or learning textures, and can coat the teeth in sugar. If you use them, squeeze the contents onto a spoon. Give drinks in an open or free-flow cup from six months, and stick to milk and water. Vitamin drops matter. The NHS recommends a daily vitamin D supplement for breastfed babies from birth, and vitamins A, C and D for children aged six months to five years. Formula-fed babies having more than 500ml a day do not need extra, as formula is already fortified. If you have questions, your health visitor is the right person to ask, and the Start4Life service offers free weaning advice.

What to know

A study of 114 healthy infants in Denver, published in Nutrients and reported on 14 September 2026, found that ultra-processed foods enter babies' diets early during weaning. Babies eating more of these foods took in more added sugar and more salt at nine and twelve months. Growth between five and twelve months was not consistently linked to ultra-processed food intake. The study was small, from one US city, and mostly involved higher income families, so the findings should not be over-read. The practical point for UK parents is simpler than the food classification debate: no added salt and no added sugar or honey before age one, check labels, and keep offering plain vegetables. Sources: Nutrients (MDPI), infant complementary feeding cohort study, September 2026. News-Medical, 'Ultra-processed foods enter babies' diets early. What comes with them?', 14 September 2026, https://www.news-medical.net/news/20260914/Ultra-processed-foods-enter-babiese28099-diets-early-What-comes-with-them.aspx. NHS, 'Foods to avoid giving babies and young children', https://www.nhs.uk/conditions/baby/weaning-and-feeding/foods-to-avoid-giving-babies-and-young-children/. This article is for general information and does not replace advice from a doctor, pharmacist, health visitor or other qualified healthcare professional. If you have concerns about your baby's feeding or growth, speak to your health visitor or GP.