Can a Pre-Surgery diet alter breast cancer cells? new study investigates

NCT ID NCT04469296

Recruiting now Knowledge-focused Sponsor: Institut du Cancer de Montpellier - Val d'Aurelle Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study is testing whether women with early-stage luminal breast cancer can follow a special diet (ketogenic or protein-restricted) for about 9 days before their surgery. The main goal is to see if patients can stick to the diet. Researchers will also look at how the diet affects cancer cells and the immune system using blood and tumor samples. It is a small pilot study with 75 participants, so it is mainly about gathering information for future research.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: iso-caloric ketogenic diet
What this could lead to: If successful, this study could show that short-term diet changes before surgery are feasible and may influence tumor biology, pointing toward future dietary interventions in breast cancer care.
What could go wrong: This is a very small, early pilot study (75 participants) focused on feasibility, not on curing cancer. It does not test whether the diet improves outcomes, and results may not apply to all patients.

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm breast tumor luminal A or B

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

BREAST CANCER SURGERY

Contacts and locations

Locations

Icm Val D'Aurelle
RECRUITING

Montpellier, Herault, 34298, France

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