A Vegetable Once Fed to Pigs Is Now a “Can.cer-Fighting Superfood” Sold at Sky-High Prices Worldwide — Growing Wild Along the Roadsides

In recent years, this humble vegetable has suddenly become a global sensation — a rare, high-priced item hailed as a “cancer-fighting green.”

For many people, sweet potato leaves were once just an ordinary dish — or even animal feed in rural areas. Yet surprisingly, they’ve now gained international recognition and are sold at steep prices as an “anti-cancer vegetable.”

Why are sweet potato leaves considered cancer-fighting?

According to a study from Tennessee State University (USA), extracts from sweet potato leaves and stems can inhibit the growth of lung and breast cancer cells. Notably, the extract from purple sweet potato leaves showed a remarkable 96.07% inhibition rate against breast cancer cells — even higher than the well-known drug Tamoxifen (95.11%).

Sweet potato leaves are rich in antioxidants such as vitamin C, vitamin E, and polyphenols. These compounds help neutralize free radicals, protect cells from oxidative damage, and reduce the risk of cancerous mutations.

Vitamin C and E protect cell membranes and DNA, while polyphenols not only provide antioxidant benefits but also possess anti-inflammatory and potential anti-cancer properties.

Additionally, the leaves are high in dietary fiber, which supports bowel movement, removes toxins, and reduces the contact time between harmful substances and the intestinal wall — thereby lowering the risk of colorectal cancer.

Sweet potato leaves also contain chlorophyll, which binds to heavy metals and carcinogens, forming compounds that are difficult for the body to absorb — helping to minimize damage. Chlorophyll also promotes a healthy gut microbiome by increasing beneficial bacteria and reducing harmful ones, further lowering cancer risks.

Nutritional difference between sweet potato leaves and tubers

Though from the same plant, the leaves and tubers have different nutritional profiles. The leaves are richer in vitamins, minerals, and antioxidants such as vitamin C, E, polyphenols, and chlorophyll. The tubers, on the other hand, are high in carbohydrates and fiber, providing energy and supporting digestion.

In short, sweet potato leaves excel in antioxidant and cancer-preventive effects, while the tubers are better for energy and gut health.

How to prepare sweet potato leaves while preserving nutrients

• Stir-fried leaves: Wash, cut, and stir-fry quickly with garlic and a pinch of salt. This keeps the texture crisp, the nutrients intact, and enhances flavor.

• Boiled leaf soup: Boil for 3–5 minutes, season lightly. This method helps the body absorb vitamins and minerals efficiently, ideal for children and the elderly.

• Juice: Blend leaves with water; add apple or lemon for better taste and nutrition — perfect for busy lifestyles.

• Dried leaves for storage: Wash and sun-dry the leaves when in season. Soak in warm water before cooking to soften.

Once dismissed as pig feed, sweet potato leaves have now become a highly sought-after superfood — nature’s simple yet powerful gift for protecting our health.