Research reviewed by Gram shows that adding nutrient fortifiers to human milk helps premature infants grow and develop, but no single fortification method has been proven best. Success depends on careful mixing, storage, and feeding. A 2026 review found that individualized monitoring and standardized procedures are essential for safety.
According to research reviewed by Gram, human milk is the best first food for premature babies, but it often falls short of the nutrients these babies need to grow quickly. A 2026 narrative review in the Turkish Archives of Pediatrics examined how hospitals add nutrient powders, called fortifiers, to breast milk. The authors found that fortification supports growth and brain development, but that how the milk is mixed, stored, and fed matters as much as what is in it. Standard and personalized approaches are both widely used, and no single method has been shown to be clearly better. Factors such as high milk concentration, contamination, and feeding intolerance may affect outcomes. Early evidence also suggests that feeding timing, linked to the body’s daily clock, may help, but more research is needed.
Key Statistics
A 2026 narrative review published in the Turkish Archives of Pediatrics concluded that human milk fortification is essential for supporting optimal growth and neurodevelopment in preterm infants, meaning babies born before 37 weeks of pregnancy.
The 2026 review found that standard and individualized fortification strategies are both widely used in neonatal intensive care units, with no clear superiority established for either approach.
The Quick Take
- What they studied: The researchers asked how hospitals can best add nutrients to breast milk for premature babies, and what factors make this process safe and effective.
- Who participated: This was a review of existing studies, guidelines, and hospital practices rather than a study with its own group of participants. No sample size was reported.
- Key finding: Adding fortifiers to breast milk supports healthy growth and brain development in premature babies. However, no single fortification method has been proven clearly better than the others.
- What it means for you: If you are caring for a premature baby, the way milk is prepared, stored, and given matters as much as the ingredients. Decisions about fortification should be made with the baby’s neonatal care team, not based on this article alone.
The Research Details
This article is a narrative review. In a narrative review, researchers gather and summarize what has already been published on a topic instead of running a new experiment. The authors looked at recent studies, international medical guidelines, and practical hospital experience with human milk fortification.
The review focused on several practical questions: when to start fortification, which methods to use, what types of fortifiers exist, and how these steps work in the neonatal intensive care unit, where premature babies receive specialized care. The authors also looked at safety issues, including how the mixture affects digestion and whether contamination can occur during preparation.
Because the review pulls from many sources, it gives a broad picture of current thinking. It does not test a new treatment, and it does not calculate a single combined result across studies.
Premature babies have high nutrient needs, and breast milk alone often cannot meet them. A review like this helps doctors and nurses see the full picture, including which practices are widely accepted and where evidence is still missing. It also shows that success depends on many everyday details, not just the nutrients in the powder.
The review was published in a peer-reviewed pediatric journal and draws on international guidelines and recent studies. However, narrative reviews do not follow a strict, pre-set method for selecting studies, so their conclusions can reflect the authors’ choices about which evidence to include. Readers should treat the findings as a well-informed summary rather than a definitive verdict.
What the Results Show
The review confirms that human milk is the recommended main food for premature babies. Breast milk alone, however, often does not provide enough protein, calories, minerals, and other nutrients for babies who are born early and need to grow rapidly. Fortification, which means adding nutrient powders or liquids to milk, is widely used to close this gap.
The authors report that fortification is essential for supporting healthy growth and neurodevelopment, meaning the way the nervous system and brain develop over time. Two main approaches are common. In standard fortification, every baby receives the same amount of fortifier. In individualized fortification, the amount is adjusted based on each baby’s growth, blood tests, and tolerance. The review found no clear proof that one approach is better than the other.
The review also stresses that the process matters as much as the product. Milk that is mixed incorrectly, stored too long, or handled without care may carry a higher risk of bacterial contamination. Adding fortifiers can also raise the concentration of the milk, which may make feeding harder to tolerate for some babies. Signs of feeding intolerance, such as spitting up or belly swelling, may signal that the mixture or feeding plan needs adjustment.
The authors point to emerging evidence about chrononutrition, which studies how the timing of meals interacts with the body’s internal daily clock. Early work suggests that feeding timing may influence outcomes in premature infants, but the authors describe this evidence as preliminary. It is not yet clear how much timing matters or how it should be applied in practice.
The review also treats fortification as an ongoing clinical process rather than a single decision. Feeding plans may need regular review as the baby grows, and monitoring helps catch problems such as intolerance or changes in growth early. This framing shifts attention from simply choosing a product to managing the whole feeding routine carefully.
This review fits with the broader medical view that breast milk is the preferred food for premature babies and that most premature infants need additional nutrients to grow well. Its finding that standard and individualized fortification are both used without clear superiority matches the current state of the evidence, which many guidelines also describe as unsettled. The emphasis on safe preparation and monitoring reflects longstanding concerns in neonatal care.
The review is a narrative summary, so it does not combine results from many studies using a formal statistical method. It also does not report exact effect sizes, such as how much a specific fortifier changes weight gain. The authors state that more research is needed to identify the best fortification strategy and to determine whether chrononutrition approaches truly improve outcomes. Because the selection of studies was not formally standardized, readers should interpret the conclusions as a helpful overview rather than a final answer.
The Bottom Line
High confidence: Human milk should remain the primary food for premature babies, and fortification is widely supported when a baby needs extra nutrients for growth. High confidence: Preparation, storage, and hygiene practices are essential for safety. Low to moderate confidence: Feeding timing based on the body’s daily clock may help, but this idea needs more study before it becomes standard advice. Any change to a premature baby’s feeding plan should be made by the care team.
This article is most relevant to parents of premature babies, neonatal nurses, dietitians, and clinicians who manage infant feeding. Parents of full-term babies, or adults looking for general nutrition advice, will find less direct application here. Anyone whose infant is in a hospital should follow the instructions given by the care team rather than making independent changes.
Feeding changes in premature babies are usually assessed over days to weeks, with growth checked regularly by the medical team. Improvements in weight gain or feeding tolerance may appear within a few weeks of a plan change, but the timeline varies widely between babies. Long-term effects on development are measured over months and years, and the care team can explain what to expect for a specific baby.
Frequently Asked Questions
Why do premature babies need fortified breast milk?
Premature babies, born before 37 weeks, have higher nutrient needs than breast milk alone can meet. A 2026 review reported that fortifiers, which are added nutrient powders, support healthy growth and brain development. Care teams may adjust the mixture based on each baby’s needs.
Is standard or personalized breast milk fortification better for preterm babies?
Neither approach has been shown to be clearly better. A 2026 narrative review found that both standard and individualized fortification are widely used in neonatal intensive care units. Researchers say more studies are needed to identify the best strategy for each infant.
What risks come with fortifying breast milk for premature infants?
Risks include higher milk concentration, which can affect digestion, contamination during preparation, and feeding intolerance. A 2026 review emphasized that careful preparation, proper storage, and close monitoring help reduce these concerns. Hospitals follow standardized procedures to protect safety.
Want to Apply This Research?
- Record each feeding’s time, volume of breast milk, fortifier type and amount if prescribed, and any signs of feeding intolerance such as spitting up, bloating, or unusual fussiness. Add weight measurements taken at the care team’s recommended schedule. Share these logs during appointments to help the team make informed decisions.
- Use the app’s reminder feature to keep feeding times consistent, and log when milk was prepared and when it was used so storage times stay within safe limits. Follow the hospital’s written preparation instructions exactly, and note any changes the care team asks you to make.
- Keep a running log throughout the hospital stay and any early discharge period, reviewing weekly trends in weight, feeding volume, and tolerance with the care team. Update the log whenever the feeding plan changes so that the effects of each adjustment can be seen over time. Always treat the app as a record-keeping tool, not a replacement for medical guidance.
This article summarizes a narrative review and is provided for general information only. It is not medical advice. Feeding plans for premature infants must be set by a neonatal care team or pediatrician. Parents should never change a baby’s feeding, milk preparation, or fortifier use without professional guidance.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.