A Leaf of Hope: Filipino Students Find Anti-Cancer Potential in Cassava Leaves

In the quiet corners of backyard gardens across the Philippines, cassava—or kamoteng kahoy—grows with little fuss. Its roots are a staple, grated into cassava cake, mashed into nilupak, or steamed for a simple snack. But while its earthy root has long been valued, it’s the leaves—often overlooked or even feared—that are now stirring global interest. And with it, a surprising truth emerges: cassava leaves’ healing potential might be more powerful than we ever imagined.

At Quezon City Science High School, three students—Emmanuelle Reigne Tica, Gabrielle Ruth Shinyo, and Bryce Ethan Cruz—have discovered something remarkable. Their research found that methanolic extracts from cassava leaves were 4.6 times more toxic to breast cancer cells than to normal cells, showing potential as a plant-based treatment that could one day contribute to cancer therapy.

The study earned recognition at the American Association for Cancer Research forum in Chicago and a finalist spot at the 2025 Genius Olympiad. But the deeper impact of their work goes far beyond awards—it reframes how we see a plant that’s as old as our kitchens, yet still full of secrets.

Cassava Leaves’ Healing Potential: Between Caution and Culture
While widely consumed in other countries, cassava leaves carry a unique reputation in the Philippines. In Quezon, they’re known colloquially as “papak demonyo”—a name that hints at both the leaf’s pointed shape and the folklore around its toxicity. Some claim the name reflects the physical form, like devil’s hands; others say it’s because the leaves, when improperly prepared, have caused sickness.

And they have. Cassava contains cyanogenic compounds, which, if not properly processed, can release cyanide. In 2005, during the Palarong Pambansa in Mabini, Bohol, cassava snacks were linked to the deaths of 27 schoolchildren. Another incident in Santa Cruz, Davao del Sur in 2015 resulted in two deaths from cassava poisoning. The plant demands deep respect—and deep knowledge.

Yet despite the danger, these leaves are still eaten in parts of Mindanao, Zamboanga, and the Visayas—carefully boiled and used in coconut-based stews passed down through generations. It’s not laing—which is made with gabi leaves—but something more obscure, more elusive. A dish that isn’t always named, but never forgotten. (For safer leafy dishes, see our laing recipe with gata for comparison.)

Rediscovering Cassava Leaves’ Healing Potential Through Science
What makes the students’ research so powerful is that it doesn’t just discover—it re-discovers. It looks at a familiar plant with fresh eyes and reveals something hidden in plain sight: healing potential.

For many Filipinos, this reframing is deeply personal. It suggests that the solutions to some of our biggest health challenges might be growing in the margins, in the weeds, in the plants we once dismissed or feared. It means that medicine doesn’t always come in bottles. Sometimes, it comes with gata and luya. Sometimes, it’s already part of the land.

And now, with emerging science backing up what traditional healers have long known, cassava leaves’ healing potential might finally be taken seriously by both the medical community and home cooks alike.

The Wisdom on Our Plates: Functional Food and Filipino Instinct
Filipino food has always been functional. We eat malunggay for strength, saluyot for digestion, luya for colds. Our elders may not have had the terminology for antioxidants or phytochemicals, but they had instinct, memory, and thousands of years of trial and error. The line between food and medicine was always blurred.

This is what makes this student-led project more than just a science fair triumph. It is a story about heritage, healing, and the possibility that what we need most might be what we already have.

If you’re exploring other healing ingredients in Filipino cuisine, try our guide on herbal Filipino ingredients with health benefits.

Final Note: Look Up, Look Closer
So the next time you pass by a cassava plant, don’t just see the root. Look up. Look at the leaves. There, in the branches, in the names we’ve given them, and in the stories we’ve told, lies cassava leaves’ healing potential. It’s the beginning of something new—and something very old.