London: Rising infant formula prices are placing severe financial and emotional pressure on families across the UK, with some parents reporting unsafe feeding practices, mounting debt and significant deterioration in mental wellbeing, according to a new study led by Swansea University.

Funded by the Medical Research Council, the research examined the experiences of 281 parents through surveys and interviews. Researchers found that the cost of formula had become a major source of financial insecurity and distress for families who depend on formula to feed their babies.
Families making painful trade-offs
The study found that financial pressure was affecting both household finances and infant-feeding decisions.
Among the reported coping strategies:
- Nearly 40% of parents said they had used potentially unsafe feeding practices, including watering down formula, reusing leftover formula or reducing sterilisation.
- 43% reported falling behind on household bills.
- 47% had taken on debts that were difficult to repay.
- 37% said they had left their homes without heating to reduce expenses.
- 21% of mothers reported shortening maternity leave to return to work earlier.
- 48% introduced solid foods earlier than recommended or before their baby was ready.
- 45% switched to cheaper formula intended for older infants.
- 10% reported taking formula from a shop without paying as a last resort.
Researchers said the findings demonstrate that infant formula cannot be treated like an ordinary discretionary consumer product because families who rely on it need a dependable supply to feed their babies.
Mental health impact
The financial pressure was also closely linked to emotional distress.
Almost every parent surveyed reported an adverse impact on their mental health. Some described intense anxiety, guilt and isolation, while others said the financial and feeding pressures contributed to feelings associated with postnatal depression.
Lead researcher Professor Amy Brown, Professor of Public Health at Swansea University, said the scale and severity of the experiences were greater than researchers had expected.
She noted that infant formula prices rose by up to 45% between 2021 and 2023, while a UK Competition and Markets Authority investigation had identified concerns around price increases and high profit margins in the infant-formula market.
Formula affordability becomes a wider food-security issue
The study also highlights the vulnerability of low-income families. More than half of UK babies receive some formula during their first week, while 88% receive some formula by six months, according to the research.
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Researchers said the problem is particularly complicated for mothers who had intended to breastfeed but were unable to do so because of insufficient support. Some subsequently faced difficulty paying for formula, creating what researchers described as a compounded sense of guilt and failure.
Professor Brown called for a more comprehensive approach to infant feeding—one that provides stronger breastfeeding support for women who want it while ensuring that parents who use formula can obtain safe, affordable and reliable infant nutrition.
A warning for policymakers and the dairy industry
The findings put infant formula affordability at the intersection of food security, public health, household economics and dairy-sector pricing.
For policymakers, the challenge is not simply controlling retail prices. It also involves ensuring competition, transparent pricing, adequate support for vulnerable households and access to appropriate infant-feeding guidance.
For the dairy and infant-nutrition industry, the study reinforces the importance of treating infant formula as an essential nutrition product where affordability and supply security are closely connected to public health.
The researchers’ central message is straightforward: when the cost of feeding a baby becomes unaffordable, families can be forced into choices that affect not only their finances but potentially infant safety, nutrition and parental wellbeing.
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