Phytochemicals from Agro-Industrial By-Products for Breast Cancer Prevention and Therapy: Molecular Mechanisms and Circular Bioeconomy Perspective

Could the peels of your pomegranate or onion hold the key to fighting breast cancer? Scientists are turning food waste into a powerful arsenal against one of the world's deadliest diseases.

Breast cancer is a global menace, but nature's leftovers might offer a surprising defense. Agro-industrial by-products—like pomegranate peels, onion skins, and citrus waste—are packed with phytochemicals that show real promise in the fight against this disease. These humble scraps are rich in polyphenols, flavonoids, and other secondary metabolites, including punicalagins, ellagic acid, quercetin, hesperidin, and naringin. Studies reveal these compounds possess antioxidant, anti-inflammatory, and anticancer properties, making them potential allies in both prevention and adjunctive therapy.

But how do they work? In vitro and in vivo experiments show these phytochemicals can modulate key molecular pathways involved in breast cancer initiation and progression. They help regulate oxidative stress, induce apoptosis (programmed cell death), inhibit cell proliferation, and suppress critical signaling cascades like PI3K/Akt, NF-κB, and MAPK. It's a multi-pronged attack on cancer's machinery.

Beyond the lab, this approach supports a circular bioeconomy—turning waste into valuable bioactive compounds while reducing environmental impact. It's a win-win for health and sustainability. However, the path to clinical use requires more research to improve bioavailability, clarify mechanisms, and validate effectiveness in humans. For now, these findings turn food waste into a beacon of hope.

Key Points

• Pomegranate peels, onion skins, citrus waste yield anticancer phytochemicals.
• Compounds modulate PI3K/Akt, NF-κB, MAPK pathways in breast cancer.
• Valorizing agro-waste supports circular bioeconomy and sustainability.