Introduction
New research suggests that the diet of men before becoming fathers may significantly affect their children’s health. A study published in Nutrition Research examined 43 parent-child triads in Ribeirão Preto, Brazil, focusing on the link between fathers’ consumption of ultra-processed foods and newborns’ growth and body composition.
Ultra-Processed Foods and Their Consumption
Ultra-processed foods include items like processed meats, sugary drinks, packaged snacks, and cookies. These foods often contain ingredients not used in home cooking. In the study, ultra-processed foods constituted about 30% of fathers’ calorie intake.
Study Findings
After adjusting for variables such as age and lifestyle factors, researchers identified that higher consumption of ultra-processed foods by fathers correlated with increased birth weight and greater body measures in newborns. These findings challenge the notion that preconception health concerns only mothers.
Implications for Preconception Health
According to Daniela Sartorelli from the University of São Paulo, both prospective parents should adopt healthy habits before conception. The study supports limiting ultra-processed food intake during this period, emphasizing that no safe consumption level exists.
Potential Biological Mechanisms
Fathers may influence fetal growth through epigenetic changes, which alter gene function without modifying DNA sequences. One gene of interest is IGF-II, affecting fetal growth. The study suggests paternal diet and obesity might regulate this gene through DNA methylation.
Mother vs. Father Dietary Impact
The research found differing dietary impacts between mothers and fathers on newborn growth. While fathers’ diets were linked to increased birth weight, mothers’ higher intake of ultra-processed foods was associated with lower birth metrics.
Study Limitations
The authors caution that the study’s sample size was small and relied on dietary recalls, not direct observations. Participants’ diets were assessed during pregnancy, serving as proxies for preconception habits. These limitations suggest that the results should be carefully interpreted.
Conclusion
The study underscores the necessity of including fathers in preconception health discussions. If larger studies validate these findings, they could further demonstrate the critical role fathers’ diets play in shaping children’s health.
A higher paternal ultra-processed food consumption is directly associated with parameters of neonatal anthropometry. Nutrition Research, 151, pp. 16–25. doi:10.1016/j.nutres.2026.04.015.
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