Artificial Sweetener Shows Potential to Kill Pancreatic Cancer Cells Without Harming Healthy Tissue

A new study suggests that stevia, a popular zero-calorie sweetener, could hold promise far beyond replacing sugar. When fermented with a probiotic bacteria isolated from banana leaves, stevia extract was found to kill pancreatic cancer cells in the lab while leaving healthy kidney cells unharmed.

The research, published in the International Journal of Molecular Sciences and also in Science Daily, highlights a compound called chlorogenic acid methyl ester (CAME), which is created when stevia undergoes microbial fermentation. This compound appears to be the key to the extract’s cancer-fighting power.

A Possible Breakthrough for a Hard-to-Treat Cancer

Pancreatic cancer is one of the deadliest cancers worldwide, with a five-year survival rate of less than 15%.

It is sometimes resistant to conventional treatments like chemotherapy and radiation, making the search for new therapies critical. Pancreatic cancer is the 12th most common cancer worldwide.

Turning a Sweetener into a Cancer-Fighting Agent

The research team compared regular stevia extract with fermented stevia extract (FSLE) created using a plant-derived Lactobacillus plantarum strain from banana leaves. When tested against pancreatic cancer (PANC-1) cells, the fermented version showed significantly stronger cancer-killing effects than the non-fermented extract.

Just as importantly, FSLE showed minimal toxicity to non-cancerous cells, even at the highest concentrations tested. That selectivity is a major challenge for cancer therapies, which often damage healthy tissue right alongside the tumors they are aiming to treat.

The Role of Microbial Transformation

The fermentation process reduced the amount of chlorogenic acid in the extract by a factor of six and transformed it into CAME, which demonstrated far greater cytotoxicity against cancer cells.

“This microbial transformation was likely due to specific enzymes in the bacterial strain we used,” Danshiitsoodol explained in a Science daily analysis. “Our data demonstrate that CAME exhibits stronger pro-apoptotic effects—meaning it encourages cancer cells to self-destruct—compared to chlorogenic acid alone.”

Artificial Sweetener Shows Potential to Kill Pancreatic Cancer Cells: Next Steps

The researchers plan to move into animal studies next to explore how FSLE behaves in a whole-body system and to determine effective dosing.

If future research confirms the findings, fermented stevia could represent a low-cost, naturally derived option to complement existing pancreatic cancer treatments—a rare bit of good news in the fight against one of the world’s deadliest cancers.