BREAST CANCER PREVENTION TIP!

Can Switching Personal Care Products Change Breast Tissue Biology?

In 2023, a peer-reviewed pilot study published in the journal Chemosphere (known as the REDUXE study) explored whether reducing exposure to certain common cosmetic chemicals could affect breast tissue at a molecular level.

What did the study do?

Researchers followed 41 healthy women who regularly used personal care products containing parabens and phthalates — chemicals commonly found in cosmetics, lotions, deodorants, and products labelled simply as “fragrance.”

For 28 days, participants switched to alternatives free of parabens and phthalates. Researchers collected:

 • Urine samples (to confirm exposure reduction), and

 • Breast tissue samples (using fine-needle aspiration) before and after the intervention.

What did they find?

After four weeks, researchers observed:

 • Significant reductions in paraben and phthalate metabolites in urine, confirming that exposure dropped quickly.

 • Changes in gene expression within breast tissue, shifting away from patterns associated with cancer-related pathways, including PI3K-AKT/mTOR, which plays a role in cell growth, survival, and hormone signalling.

Importantly, these women did not have cancer. The findings relate to cellular and molecular patterns, not disease diagnosis.

What this study does prove

 It shows that everyday chemical exposures can change quickly when products are swapped.  It demonstrates that breast tissue responds at a molecular level to changes in environmental exposure.

Which chemicals were involved? EDCs (endocrine disrupting chemicals)

This study specifically focused on:

 • Parabens (e.g., methylparaben, propylparaben)

 • Phthalates (e.g., DEP, DBP — often hidden under “fragrance”)

Why does this matter?

Parabens and phthalates are known as endocrine-active chemicals, meaning they can mimic or interfere with hormones like oestrogen. Hormones play an important role in breast tissue biology, and oestrogen dependent cancer.

 The takeaway

Choosing cleaner personal care products isn’t about fear — it’s about informed choice, precaution, and supporting your bodies health & function.

Shine bright, Nic