According to Gram Research analysis, eye-tracking technology can measure how nutrition affects young children’s attention and memory, with 5 of 9 studies reviewed showing significant links between what children eat and their brain function. Eye-tracking works by recording where children look and for how long, providing objective data about attention and memory without requiring complex instructions—making it ideal for testing children under age 5.
A new review of 9 studies shows that eye-tracking technology—which follows where a child looks—can measure how nutrition affects a young child’s attention and memory. Researchers found that 5 out of 9 studies showed clear links between what kids eat and how well they pay attention and remember things. Eye-tracking is a clever, non-invasive way to test children’s thinking skills, and it works well in different countries and settings. This method could help scientists better understand exactly which nutrients help children’s brains develop best during the critical early years of life.
Key Statistics
A 2026 systematic review of 9 studies found that 5 demonstrated significant relationships between early life nutrition exposures and children’s attention and memory outcomes as measured by eye-tracking technology.
Eye-tracking assessments proved feasible across multiple settings and countries, with researchers successfully training local staff in low- and middle-income countries to conduct cognitive assessments using this technology.
The systematic review included 3 randomized controlled trials, 5 prospective cohort studies, and 1 combined study design, with the majority of research conducted in low- and middle-income countries where nutrition interventions are particularly relevant.
The Quick Take
- What they studied: Whether eye-tracking technology can measure how early nutrition (from pregnancy through age 5) affects children’s attention and memory skills
- Who participated: A review of 9 published studies involving pregnant women, nursing mothers, and young children aged 0-5 years, mostly conducted in lower-income countries
- Key finding: Five of the nine studies found that nutrition directly affected how well children paid attention and remembered things, as measured by eye-tracking. Eye-tracking proved to be a practical tool that works across different settings and countries.
- What it means for you: Eye-tracking offers a new, objective way to understand which nutrients matter most for brain development. This could help doctors and parents make better nutrition choices for young children, though more research is still needed to confirm which specific nutrients have the biggest impact.
The Research Details
This was a scoping review, which means researchers searched through scientific databases (PubMed, Embase, and Food Science and Technology Abstracts) from the beginning of each database through April 2024 to find all published studies that combined two things: studies about nutrition in young children and studies that used eye-tracking to measure brain function. They looked for studies involving pregnant women, breastfeeding mothers, or children under age 5.
The researchers found 1,140 articles initially, but only 9 met their specific requirements. These 9 studies included 3 randomized controlled trials (the gold standard where some kids get a nutrition intervention and others don’t), 5 prospective cohort studies (where researchers follow kids over time), and 1 study that combined both methods. Most studies took place in low- and middle-income countries.
Eye-tracking technology works like a camera that records exactly where a child is looking and for how long. This gives scientists objective data about attention and memory without needing the child to answer questions or perform complicated tasks—perfect for very young children who can’t follow complex instructions.
Traditional tests of children’s thinking skills often rely on tasks that are hard for young kids to understand or complete. Eye-tracking is different because it measures what children naturally do—look at things—without requiring them to follow complicated instructions. This makes it especially useful for testing very young children and for detecting subtle changes in attention and memory that other tests might miss. By using eye-tracking, scientists can see exactly how specific nutrients affect specific brain functions like attention span and memory.
This review followed strict scientific guidelines (PRISMA-ScR checklist) to ensure quality. However, the small number of studies (only 9) means the evidence is still limited. The fact that most studies were done in low- and middle-income countries is good for diversity but means results may not apply equally everywhere. The review shows promise but highlights that more research is needed before making strong recommendations.
What the Results Show
Out of 9 studies reviewed, 5 demonstrated significant relationships between what children ate and their attention and memory abilities as measured by eye-tracking. This means more than half the studies found clear evidence that nutrition matters for these specific brain functions. The studies examined different nutrients and different types of nutrition interventions—some looked at breastfeeding versus formula, others at specific vitamin or mineral supplements, and others at overall diet quality.
The eye-tracking assessments were feasible across multiple different settings and countries, suggesting this technology is practical and can be used consistently. Researchers were able to successfully train local staff in different locations to use the equipment and conduct the tests properly. This is important because it means eye-tracking isn’t limited to fancy research labs—it can work in clinics and community settings in various parts of the world.
The studies that showed positive results found that eye-tracking could detect differences in how children paid attention to images, how quickly they shifted their gaze between objects, and how well they remembered where things appeared on a screen. These specific measurements appear to be sensitive enough to pick up the effects of nutrition on brain development.
The review found that eye-tracking is particularly good at measuring attention and memory—two brain functions that are especially important for learning and development. The studies showed that eye-tracking could detect both immediate effects of nutrition and longer-term impacts on how children’s brains develop. Additionally, the review noted that eye-tracking works well across different age groups within the 0-5 year range, from infants to preschoolers.
Previous research has shown that nutrition affects children’s thinking skills, but scientists often struggled to measure exactly which brain functions were affected. Traditional cognitive tests for young children can be unreliable because they depend on the child’s ability to follow instructions and cooperate. Eye-tracking offers a more objective, precise measurement tool. This review suggests that eye-tracking may be more sensitive to specific nutrition effects than older testing methods, filling an important gap in how scientists study nutrition and brain development.
The biggest limitation is the small number of studies—only 9 met the criteria. This means the evidence, while promising, isn’t yet conclusive. Additionally, the studies examined many different types of nutrition exposures and used different eye-tracking tasks, making it hard to compare results directly. Most studies were conducted in low- and middle-income countries, so results may not apply equally to children in wealthier countries with different diets and healthcare systems. The review also couldn’t determine which specific nutrients have the strongest effects because studies looked at different nutrients. Finally, most studies were relatively small, so larger studies are needed to confirm these findings.
The Bottom Line
Eye-tracking is a promising tool for measuring how nutrition affects children’s attention and memory during early development. Parents and healthcare providers should be aware that this technology exists and may become more common in research and clinical settings. However, current evidence is still limited, so specific nutrition recommendations based on eye-tracking studies should wait for more research. The strongest evidence supports ensuring adequate nutrition during pregnancy and early childhood, as this has been shown to support brain development through multiple research methods.
Researchers studying child development and nutrition should care about this review because it shows eye-tracking is a practical tool for their work. Healthcare providers who work with young children may eventually use eye-tracking to assess development. Parents should care because better assessment tools could lead to better understanding of which nutrients matter most for their children’s brain development. Public health officials in low- and middle-income countries should pay attention because most studies were conducted in these regions, suggesting the method works well there.
Eye-tracking studies typically measure effects over weeks to months, so changes in attention and memory could potentially be detected relatively quickly. However, the long-term effects of nutrition on brain development unfold over years. Parents shouldn’t expect overnight changes from nutrition improvements, but consistent good nutrition during the first 5 years of life appears to support better attention and memory development over time.
Frequently Asked Questions
How does eye-tracking measure a child’s brain development and thinking skills?
Eye-tracking records exactly where a child looks and for how long, measuring attention and memory without requiring the child to follow complex instructions. This objective data reveals how well children focus on objects, remember locations, and shift their attention—all signs of healthy brain development.
What nutrients did the studies find most important for children’s attention and memory?
The review examined various nutrients but didn’t identify one single most important nutrient. Studies looked at breastfeeding, vitamins, minerals, and overall diet quality. This highlights why a balanced diet with adequate nutrition across multiple nutrients matters for brain development.
Can parents use eye-tracking at home to check their child’s development?
Currently, eye-tracking is primarily used in research and clinical settings by trained professionals. However, as the technology becomes more accessible, home-based versions may eventually be available. For now, parents should discuss developmental concerns with their pediatrician.
How quickly do children show improvements in attention and memory from better nutrition?
Studies typically measured effects over weeks to months, suggesting some changes could be detected relatively quickly. However, the most important brain development effects from nutrition occur over years, so consistent good nutrition during early childhood is what matters most.
Are the findings from these studies applicable to all children worldwide?
Most studies were conducted in low- and middle-income countries, so results may apply best there. Children in wealthier countries with different diets may show different patterns. More research in diverse populations is needed to confirm whether findings apply universally.
Want to Apply This Research?
- Track your child’s nutrition intake (key nutrients like iron, zinc, choline, and omega-3 fatty acids) alongside developmental milestones related to attention and memory, such as how long they can focus on an activity or how well they remember familiar people and objects.
- Use the app to set daily nutrition goals for your child based on age-appropriate recommendations, then log meals and snacks to ensure adequate intake of brain-supporting nutrients. Set reminders for key feeding times and track which foods your child enjoys that are nutrient-rich.
- Create a long-term nutrition and development log that tracks dietary patterns over months, noting any changes in your child’s attention span, memory, or learning ability. Share this information with your pediatrician to identify patterns and ensure your child is getting optimal nutrition for brain development.
This review summarizes scientific research about eye-tracking as a tool for measuring nutrition’s effects on child development. It is not medical advice. Parents and caregivers should consult with their pediatrician or healthcare provider about their child’s nutrition and development. The findings are based on a limited number of studies, and more research is needed before making specific clinical recommendations. Individual children may respond differently to nutrition interventions based on genetics, overall health, and other factors.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.
