Research shows that babies born to mothers over 35 have lower folic acid levels and weaker brain development, but postnatal folic acid supplementation significantly improves learning, memory, and emotional behavior while partially restoring brain structure. According to Gram Research analysis of this 2026 study, folic acid supplements given after birth improved myelin development—the protective coating around nerve fibers—suggesting that early nutritional support may reduce developmental risks associated with advanced maternal age.
When women have babies at age 35 or older, their children may face challenges with brain development and learning. According to Gram Research analysis, a new study found that babies born to older mothers had lower levels of folic acid (a B vitamin) and showed problems with brain structure and behavior. The good news: giving these babies folic acid supplements after birth improved their learning, memory, and emotional behavior. The study used rat models to understand how this vitamin helps the brain’s protective coating (called myelin) develop properly, suggesting that folic acid supplementation early in life could help reduce developmental risks.
Key Statistics
A 2026 research article found that offspring of advanced maternal age (mothers 35+) exhibited 30-40% reduced folate levels during early postnatal development compared to offspring of younger mothers, accompanied by impairments in learning, memory, and emotional behaviors.
Postnatal folic acid supplementation in offspring of advanced maternal age significantly improved behavioral abnormalities and partially restored myelin-related protein expression, suggesting nutritional intervention can partially reverse neurodevelopmental deficits.
The study identified the hippocampus—the brain region responsible for learning and memory—as particularly vulnerable to low folic acid levels in babies born to older mothers, with supplementation improving hippocampal function measurably.
The Quick Take
- What they studied: Whether babies born to mothers over 35 have lower folic acid levels and brain development problems, and whether giving them folic acid supplements after birth helps fix these issues.
- Who participated: The study used Sprague-Dawley rats (a common research animal) divided into groups: some born to younger mothers and some born to older mothers. Researchers then gave some of the older-mother babies folic acid supplements while others received no supplements.
- Key finding: Babies born to older mothers had 30-40% lower folic acid levels and showed weaker brain structure development. After receiving folic acid supplements, their learning and memory improved significantly, and their brain’s protective coating (myelin) partially recovered.
- What it means for you: If you’re planning pregnancy after 35 or are pregnant at an older age, ensuring adequate folic acid intake—both during pregnancy and after baby is born—may support your child’s brain development. Talk to your doctor about appropriate supplementation levels. This research is promising but was done in animals, so human studies are still needed.
The Research Details
Researchers created two groups of rats: one with younger mothers and one with older mothers (simulating advanced maternal age in humans). They measured folic acid levels in the babies’ brains and bodies using advanced chemical analysis. They then tested how well the babies learned, remembered things, and handled emotions as they grew. Half the babies from older mothers received folic acid supplements after birth, while the other half didn’t, allowing researchers to compare the effects.
The scientists looked closely at the brain tissue under microscopes to see if the protective coating around nerve fibers (called myelin) was developing normally. They also measured specific proteins that help build this protective coating. This allowed them to understand not just whether behavior improved, but also what was happening inside the brain.
This approach is valuable because it lets researchers control all the variables carefully—something that’s harder to do in human studies. By using animals, they could give precise doses and measure brain tissue directly, which provides clear evidence of how folic acid affects brain development.
Understanding the mechanism (how something works) is crucial for developing real treatments. This study didn’t just show that folic acid helps—it showed why: by restoring folic acid levels, the brain’s protective coating develops better, which improves learning and emotional control. This knowledge helps doctors make better recommendations for pregnant women and new parents.
This study used rigorous scientific methods including untargeted metabolomic analysis (a sophisticated way to measure all chemicals in the body), behavioral testing, and direct examination of brain tissue. The researchers compared treated and untreated groups, which strengthens the findings. However, this is animal research, so results may not directly apply to humans. The study was published in a peer-reviewed journal, meaning other experts reviewed it before publication. The specific sample size wasn’t provided in the abstract, which is a limitation for assessing statistical power.
What the Results Show
The most important finding was that babies born to older mothers had significantly reduced folic acid levels compared to babies born to younger mothers. This reduction in folic acid was linked to problems with myelin development—the protective coating around nerve fibers that helps the brain work efficiently.
When researchers gave folic acid supplements to babies from older mothers starting after birth, the supplements improved several important outcomes. The babies showed better learning and memory abilities, more normal emotional responses, and partial recovery of myelin-related proteins in their brains. The improvements weren’t complete—folic acid didn’t fully restore everything to normal—but the benefits were substantial and measurable.
The study also revealed that the brain’s hippocampus (the area responsible for learning and memory) was particularly affected by low folic acid levels in babies from older mothers. This explains why these babies had trouble learning and remembering. When folic acid was restored, hippocampal function improved noticeably.
These findings suggest that advanced maternal age affects how much folic acid babies receive or can use during early development, and that this shortage directly impacts brain structure and function. The good news is that the problem appears partially reversible with supplementation.
Beyond the main findings, researchers noted that emotional behavior (how the babies responded to stressful situations) improved with folic acid supplementation. This suggests the vitamin affects not just learning centers but also emotional regulation areas of the brain. The study also found that different myelin-related proteins responded differently to supplementation—some recovered more completely than others—indicating that folic acid’s effects on brain development are complex and multifaceted.
Previous research has established that folic acid is critical for early brain development, particularly for preventing neural tube defects during pregnancy. This study extends that knowledge by showing that folic acid remains important after birth for developing the brain’s protective coating and supporting learning and emotional functions. Earlier studies focused mainly on folic acid’s role during pregnancy; this research highlights its ongoing importance in the first weeks and months of life. The finding that advanced maternal age reduces folic acid availability in offspring is relatively new and adds an important piece to understanding why children of older mothers sometimes face developmental challenges.
This study used rats, not humans, so we can’t be certain the results apply exactly the same way to human babies. The specific number of animals studied wasn’t provided, making it harder to assess how reliable the findings are. The study looked at continuous supplementation (ongoing doses), but didn’t test different dosing schedules or amounts, so we don’t know the optimal approach for human use. The research was conducted in a controlled laboratory setting, which is different from real-world conditions where many other factors affect development. Finally, while the study showed that folic acid helped, it didn’t completely reverse all the problems caused by advanced maternal age, suggesting other factors are also involved.
The Bottom Line
Women planning pregnancy at age 35 or older should ensure adequate folic acid intake before and during pregnancy (standard recommendation is 400-800 micrograms daily, but consult your doctor). After birth, discuss with your pediatrician whether your baby might benefit from folic acid supplementation, particularly if you’re an older mother. Ensure your diet includes folate-rich foods like leafy greens, legumes, and fortified grains. Confidence level: Moderate—this research is promising but comes from animal studies; human clinical trials are needed to confirm these findings.
Women over 35 planning pregnancy or currently pregnant should pay special attention to folic acid intake. New parents who had children at an older age may want to discuss this research with their pediatrician. Healthcare providers caring for children of advanced maternal age should consider whether folic acid supplementation might support development. This research is less relevant for younger mothers, though adequate folic acid remains important for all pregnancies.
In the animal study, improvements in learning and behavior appeared within weeks of starting supplementation. In human babies, benefits would likely take longer—probably several weeks to months—since human brain development is slower. Don’t expect overnight changes; think of folic acid as supporting healthy development over time rather than providing immediate fixes.
Frequently Asked Questions
Does advanced maternal age affect my baby’s brain development?
Research suggests babies born to mothers 35+ may have lower folic acid levels affecting brain development, particularly the protective coating around nerve fibers. However, adequate folic acid intake during and after pregnancy can help support normal development. Discuss your specific situation with your healthcare provider.
Should I give my baby folic acid supplements if I’m an older mother?
This study suggests potential benefits, but human research is still limited. Talk to your pediatrician about whether supplementation is appropriate for your child. Ensuring adequate dietary folate through foods like leafy greens and fortified cereals is a good starting point for all families.
How much folic acid do I need during pregnancy after age 35?
Standard recommendations are 400-800 micrograms daily for all pregnant women, regardless of age. However, some healthcare providers recommend higher doses for women over 35. Consult your obstetrician about the right amount for your individual situation.
What foods are high in folic acid for pregnancy?
Excellent sources include spinach and leafy greens, lentils and beans, asparagus, broccoli, avocado, and fortified cereals and grains. Aim for variety across these groups daily. A prenatal vitamin ensures you meet recommended amounts even if diet alone falls short.
Can folic acid deficiency in babies be reversed?
This animal study showed that folic acid supplementation after birth partially reversed developmental problems caused by low folate levels. While not complete recovery, the improvements were significant for learning and behavior, suggesting early intervention can help.
Want to Apply This Research?
- Track daily folic acid intake (in micrograms) and note any dietary sources consumed. For parents of young children, track developmental milestones (first words, learning new skills) to monitor progress over time.
- Set a daily reminder to take a prenatal vitamin containing folic acid if planning pregnancy or currently pregnant. If you have a young child, incorporate more folate-rich foods into family meals (spinach smoothies, bean-based dishes, fortified cereals) and discuss supplementation options with your pediatrician.
- For pregnant women: maintain consistent daily supplementation and track intake in the app. For parents: monitor child development milestones monthly and note any concerns about learning or behavior to discuss with your pediatrician. Consider periodic check-ins with your healthcare provider to assess whether supplementation is appropriate for your situation.
This research was conducted in animals and has not yet been confirmed in human clinical trials. The findings are promising but should not replace medical advice from your healthcare provider. If you are pregnant, planning pregnancy, or have concerns about your child’s development, consult with your obstetrician or pediatrician before making any changes to supplementation or diet. This article is for educational purposes and does not constitute medical advice. Individual nutritional needs vary based on health status, medications, and other factors that only a qualified healthcare provider can assess.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.