Ultra-processed foods linked to lower fertility

Eating large amounts of ultra-processed food (UPF) is linked not only to reduced fertility in men but also to slower growth in early embryos and smaller yolk sacs—structures essential for early embryonic development—according to new research.

- TDG NETWORK

The authors of the study, published today (Tuesday) in Human Reproduction, one of the world's leading reproductive medicine journals, say their findings suggest that lowering UPF consumption, particularly around conception and pregnancy, is beneficial for both parents and embryos.

While maternal and paternal health are already known to influence reproductive success and the development and health of offspring, no previous research has examined the combined effect of both parents' UPF intake on time to conception and early embryonic development.

Consumption of UPFs has risen sharply in recent years. These foods are typically high in added sugars, salt, saturated and trans fats, and artificial additives, while being low in fibre, whole foods, and essential nutrients. They are generally designed for convenience and large-scale production rather than nutritional value. In some high-income countries, UPFs now make up as much as 50-60% of daily food intake.

"Even though UPFs are so common in our diets, very little is known about their potential relationship with fertility outcomes and early human development," said Dr Romy Gaillard, a paediatrician and associate professor of developmental epidemiology at Erasmus University Medical Center in Rotterdam, the Netherlands, who led the study.