Obesity is one of the biggest health challenges facing the world today, and its effects are not limited to the health of the individual, but extend to future generations in ways that were not fully understood until recently.
In this context, a new study from the University of California, Irvine highlights an important and often overlooked factor in global efforts to understand and combat childhood obesity: parental health.
The study, published in the journal Current Obesity Reports, examines how a father's health before and during fatherhood—including obesity, diet, stress, mental health, and daily habits—can affect a child's risk of developing obesity and related diseases, even before conception.
The findings suggest that what is often called the "father's body," or "dad bod," may reflect health factors capable of shaping children's long-term health, and that it is not as harmless as it may initially seem.
The term "dad pod" is used to describe a certain body type in men, combining physical fitness with a little excess weight or a small belly.
“We found that paternal health contributes significantly to children’s health through biological, behavioral, and environmental pathways,” says Matthew Landry, assistant professor of population health and disease prevention and a nutritionist, and lead author of the study. While maternal health has long been the focus in trying to understand childhood obesity worldwide, this study and other evidence suggest that fathers play a similar role in shaping their children’s health.
Landry emphasizes that obesity is not simply the result of individual choices, explaining that the risk of obesity is due to genetic factors in between 40% and 70% of cases, and can be passed down through generations through complex biological and environmental influences.
Recent evidence suggests that obesity can affect sperm quality and alter epigenetic markers—biological signals influenced by behavior and environment that help regulate gene function during early development. These changes can affect appetite regulation, metabolism, and the risk of long-term disease in children.
These effects can be reversible. According to the researchers, interventions aimed at weight loss, including lifestyle changes and bariatric surgery, can improve sperm health and modify obesity-related epigenetic patterns (chemical modifications that occur on top of DNA molecules, changing how cells read genes (turning them on or off), without causing any change to the DNA sequence itself).
In addition to biological factors, parents play a crucial role in shaping family routines and behaviors that influence children's health. Parents' dietary habits, physical activity levels, and parenting styles are closely linked to the quality of their children's diets, their activity levels, and their risk of obesity. Active participation in meal preparation, eating together, and engaging in shared physical activity have been associated with better health outcomes for children across various cultures and societies.
The health of the child's heart is formed in the womb under the influence of the mother's health!
The study also highlights broader factors that affect parents' ability to adopt healthy lifestyles, including income, food insecurity, neighborhood conditions, workplace policies, and mental health—challenges that families face worldwide, not just in the United States.
Researchers argue that healthcare systems and public health programs should include parents more in obesity prevention efforts.
