Karpolax founders Namboozo and Muyita win EPO Young Inventors Prize 2025 for their plant-based tech extending fruit shelf life across Africa.
Turning Spoilage into Strategy
In a year saturated with talk of climate action, sustainability, and food security, two young Ugandan innovators—Sandra Namboozo (26) and Samuel Muyita (27)—have managed to do something rare: create a solution rooted in African ingenuity that speaks to a global crisis. Their brainchild, Karpolax, a plant-based sachet that slows the ripening and spoilage of fruits, has earned them a coveted spot among the Top 10 Young Inventors of 2025, as recognized by the European Patent Office (EPO).
“This is not just about Uganda,” Muyita tells The Malaysian Reserve. “It’s about solving a food waste problem that affects the entire world, especially in developing economies where post-harvest loss can reach up to 45%.”
From Kampala Labs to Global Acclaim
The journey began modestly in Kampala, where Namboozo and Muyita—then students at Makerere University—noticed the heartbreakingly regular spoilage of bananas, mangoes, and tomatoes in local markets. “We were seeing waste not because of poor harvests, but because of time and temperature,” recalls Namboozo. “That was the moment we realized nature could offer us a better preservation solution.”
Their solution: a biodegradable sachet infused with plant-based compounds—all food-safe—that delays the production of ethylene gas, the natural hormone responsible for ripening in fruits. In trials across East Africa, Karpolax extended fruit shelf life by up to 14 days, giving smallholder farmers, vendors, and exporters vital time to reach markets.
Innovation Born from Urgency
According to the Food and Agriculture Organization (FAO), Africa loses food worth over $4 billion annually due to poor post-harvest handling. “For small-scale farmers, it’s the difference between profit and poverty,” says Dr. Beatrice Mbabazi, an agricultural economist in Uganda.
Karpolax’s innovation, therefore, isn’t just eco-friendly—it’s economically catalytic. By extending shelf life, the sachets help reduce food waste, increase farmer incomes, and mitigate greenhouse gas emissions from rotting produce. In short: a triple win.
A Global Problem, A Local Solution
While refrigeration and high-end logistics systems keep produce fresh in much of the developed world, many African markets still depend on informal trade and ambient storage. Karpolax was engineered for precisely this context. “Our sachets don’t need electricity or cold chains,” Muyita emphasizes. “You just drop one in a crate of bananas or avocados, and you buy yourself precious time.”
That simplicity—and affordability—is what has drawn attention beyond Africa. The duo is now in talks with food exporters in Southeast Asia and Latin America, and has secured early-stage investment from two sustainability-focused venture funds in Europe.
Recognized, But Not Resting
Being named a top 10 finalist by the EPO’s Young Inventors Prize 2025 is a watershed moment, not just for Karpolax but for African-led innovation. “It’s a validation that young Africans are not just users of global tech,” says Namboozo. “We are creators of it.”
They stand alongside other laureates from around the world, all tackling UN Sustainable Development Goals (SDGs) through technology. “Karpolax aligns with SDG 12—responsible consumption and production,” noted the EPO panel. “It’s elegant, scalable, and most importantly, impactful.”
Why This Matters
In a decade where food insecurity and sustainability dominate global policy, innovations like Karpolax may well be the pivot on which equitable food systems turn. For Africa—home to 60% of the world’s arable land but plagued by high post-harvest losses—the message is clear: homegrown solutions work best.
As Sandra and Samuel prepare to scale production and expand distribution across East Africa and beyond, their message remains refreshingly unpretentious: “We just want to help people eat what they grow,” Namboozo says with a smile. “And maybe change the world while we’re at it.”
