Researchers Explore How Fathers Influence Children's Future Obesity Risk

Father's health may shape his child's future long before birth. New research suggests that factors such as obesity, diet, stress, mental health, and lifestyle habits in fathers can influence a child's risk of developing obesity and related health problems.

Published in Current Obesity Reports, the review by researchers from the University of California, Irvine highlights an often-overlooked aspect of childhood health: the role fathers play before and during parenthood. While maternal health has traditionally received most of the attention, scientists say fathers also contribute through biological, behavioral, and environmental pathways.

Researchers found that obesity risk is not solely determined by personal choices. An estimated 40% to 70% of obesity risk is heritable, meaning it can be passed across generations through a combination of genetic, biological, and environmental factors.

One key finding involves sperm health. Evidence suggests that obesity can affect sperm quality and alter epigenetic markers—biological signals that influence how genes function during early development. These changes may affect a child's metabolism, appetite regulation, and long-term risk of obesity and chronic diseases.

The encouraging news is that these effects may not be permanent. Studies suggest that weight loss through healthier eating habits, regular exercise, and other interventions can improve sperm health and potentially reverse some obesity-related biological changes.

The review also emphasizes that fathers influence children's health after birth. Their eating habits, physical activity levels, and parenting practices often shape family routines. Children whose fathers participate in meal preparation, family meals, and physical activities are more likely to develop healthier lifestyle habits.

The findings reinforce a simple message: building healthier families starts with both parents, and fathers may have a bigger impact on children's long-term health than previously recognized.

REFERENCE: Landry, M. J., & Parker, J. J. (2026). The Role of Fathers in the Intergenerational Transmission of Obesity. Current Obesity Reports. DOI: 10.1007/s13679-026-00720-9. https://link.springer.com/article/10.1007/s13679-026-00720-9