Glucose-fructose syrup, inflammation and cancer
What it found
The authors say glucose-fructose syrup and fructose may encourage inflammation and help tumours grow, based on animal, cell and population studies.
Findings in people are mixed.
What they found
Studies in people
Population studies
Some population studies link high fructose intake to higher risk of colorectal, pancreatic and breast cancers, and to worse outcomes. Others found no link or a negative link for prostate and lung cancer.
Animal and lab studies
Gut bacteria
Too much fructose or artificial sweeteners reduced microbial diversity and shifted gut bacteria toward pro-inflammatory types, which may weaken the gut barrier.
Tumour growth in animals
In mice with a colon cancer gene, oral glucose-fructose syrup increased tumour size and grade, independent of obesity. Other animal models of melanoma, breast and cervical cancer also showed faster tumour growth.
Cancer cells in lab tests
In human colorectal cancer cell lines, fructose blocked a type of cell death under low oxygen, helping the cells survive. In pancreatic cancer cells, fructose supported nucleotide synthesis even when glucose was scarce.
Studies in people and animals
Inflammation signals
Studies report that high fructose intake raises markers of inflammation and oxidative stress, including CRP, IL-6 and TNF-alpha. In rodents, glucose-fructose syrup caused more fat-tissue inflammation than high-fat diets.
Other findings
How it is metabolised
Fructose is mostly broken down in the gut, not the liver. When more is eaten than the gut can handle, it spills over into the gut lumen and then the liver, where it drives fat production.
What the authors conclude
“Given the pervasive consumption of HFCS in processed foods and beverages, these findings underscore the urgent need for public health interventions, nutritional education, and further mechanistic studies.”
Also in their conclusions
- They say glucose-fructose syrup and fructose may promote chronic inflammation, alter immune responses and help cancer cells grow, survive and spread.
- They call for public health action, nutrition education and more research into fructose-specific mechanisms.
- They advise future work to identify vulnerable groups and to separate the effects of fructose itself from those of excess calories.
How it was done
The authors note that glucose-fructose syrup has been widely used in processed foods and drinks since the 1970s, and they wanted to review the evidence linking it to inflammation and cancer.
They pulled together laboratory, animal, human feeding and population studies on fructose and glucose-fructose syrup, covering metabolism, inflammation and cancer. No new experiments were run.
What it can’t tell you
- Many of the cancer findings come from animals and cells, so they cannot show what happens in people.
- Population studies can show a link between fructose intake and cancer, but they cannot prove that fructose causes it.
- The population findings are mixed, and the authors say differences in fructose sources, diets and individual gut bacteria may explain this.
Who paid
- Conflicts
- The authors declare that they have no conflict of interest.
- Authors work at
- Funabashi Municipal Medical Center, Japan; Chiba University, Japan; Roswell Park Comprehensive Cancer Center, USA
The paper
- Title
- High-Fructose Corn Syrup on Inflammation and Cancer
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Cite
- Aoyagi T, Ohira G, Hayano K, Martin O, Takabe K (2025). High-Fructose Corn Syrup on Inflammation and Cancer. World journal of oncology. doi:10.14740/wjon2652Free full textPubMed 41208845DOI
Summary written 26 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error