Does Ultra-processed foods cause infertility?

Probable. Several human studies point the same way, with a plausible biological mechanism, but the evidence is not yet conclusive. A combination of excess sugars and low-quality fats, additives, and low nutritional density; associated with inflammation and oxidative stress that are unfavorable to gametes.

Ultra-processed foods

Industrial food

Evidence level : Probable Snacks & ready mealsMechanism : Dietary / inflammatory burden

🟡 Several human studies point the same way, with a plausible biological mechanism, but the evidence is not yet conclusive.

Where it's found: Ready meals, salty snacks, industrial biscuits, sugary cereals, ready-made sauces.
Suspected mechanism: A combination of excess sugars and low-quality fats, additives, and low nutritional density; associated with inflammation and oxidative stress that are unfavorable to gametes.
Suggested alternative: Aim for one more home-cooked meal per week, without seeking perfection: frequency matters more than purity.
Source: NutriNet-Santé cohort; reviews on diet quality and fertility.

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Related factors

Including a factor does not mean it causes infertility: it is simply worth monitoring, depending on its level of evidence.

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Content last updated: September 14, 2026