The effect of processed foods on breast density during the first half of the menstrual cycle only happened at medium levels of consumption, not at the highest levels.

The effect of processed foods on breast density during the first half of the menstrual cycle only happened at medium levels of consumption, not at the highest levels.

When looking at how much of the total calories came from processed foods (instead of how many grams), there was no consistent link to breast density at any point in the menstrual cycle.

Even after accounting for factors like body weight, exercise habits, smoking, and mother's education level, eating more processed foods didn't consistently change breast density measurements.

When looking at all teenage girls together without considering where they were in their menstrual cycle, eating more processed foods didn't consistently change how dense their breast tissue looked on scans.

When looking at how much of the total calories came from processed foods (instead of how many grams), there was no consistent link to breast density at any point in the menstrual cycle.