A new study suggests that consuming large amounts of ultra-processed foods (UPFs) may reduce male fertility and slow embryo growth in early pregnancy. The research, led by Dutch scientists, analyzed dietary habits and reproductive outcomes in over 800 women and 650 male partners.
Core Findings
Men with higher UPF consumption had lower fertility rates and a greater risk of subfertility, defined as taking 12 months or longer to conceive. Women with higher UPF intake had smaller embryos and reduced yolk sac size, which is essential for early development. On average, UPFs made up about 25% of daily food intake for men and 22% for women.
Dietary Impact on Fertility
The study, published in the Oxford Academic Human Reproduction journal, followed couples from pre-conception to early childhood. Researchers noted that diets rich in UPFs—such as crisps, chocolate, and instant noodles—were associated with poorer sperm quality and slower embryonic growth. These findings remained significant even after accounting for factors like age, BMI, smoking, and alcohol use.
Expert Recommendations
Lead researcher Dr. Romy Gaillard emphasized that reducing UPF consumption, especially around conception, could improve fertility outcomes and embryonic health. The study highlights the need for further research into the long-term effects of UPFs on reproductive health.
Broader Health Concerns
Previous studies have linked UPFs to conditions like type 2 diabetes, heart disease, and cancer. While some experts warn of a 'chronic disease pandemic' linked to UPFs, others caution against overgeneralizing the risks. The current study adds to growing evidence of their potential impact on fertility and early development.