Ultra-processed foods harm men’s health. They increase weight, disrupt hormones, decrease testosterone, and introduce harmful substances linked to declining sperm quality. They contain industrial and synthetic ingredients. This may be why over the past 50 years, sperm quality has plummeted.

[u/mvea]

https://cbmr.ku.dk/news/2025/not-all-calories-are-equal-ultra-processed-foods-harm-mens-health/

[u/homingconcretedonkey]

This is a completely flawed study for the simple reason:

In short, They are replacing Mayonnaise that has a few ultra processed ingredients with a tomato and then comparing the effects on the male body.

A study that wasn't designed to be flawed from the start would simply provide mayonnaise that was not ultra processed, its very easy to make if an off the shelf product wasn't available.

This study simply says that if you eat nothing tasty or fun and only eat vegetables, you will be healthier.