High sugar diets are getting increasingly common worldwide and they are strongly linked to metabolic disorders such as obesity and diabetes. At the cellular level, sugar is the primary fuel for fast dividing cells, including bacteria, yeast, and cancer cells. Previous research shows that rapid cell division and high glucose metabolism can increase oxidative stress and place strain on DNA replication systems. That raises an important question that is not fully understood. Does exposure to a high sugar environment increase mutation rates in fast dividing cells? Understanding this relationship is important because increased mutation rates can lead to DNA damage, which is a key factor in cancer development and disease progression. While many studies have examined sugar’s role in metabolism, few have evidence on its direct or indirect impact on mutation frequency. This project addresses that gap by analyzing existing scientific research to evaluate whether high sugar environments contribute to increased mutation rates and to identify the biological mechanisms involved.

To test whether a high sugar environment increases mutation rates in fast dividing cells, fast growing organisms such as bacteria, yeast, and mammalian cell cultures would be used. The cells would be grown under carefully controlled laboratory conditions in two environments: a normal sugar environment and a high sugar environment. All other factors, including temperature, pH, oxygen levels, nutrients, and growth time, would be kept constant so that sugar concentration is the only variable affecting the cells. The cells would be allowed to divide over many generations to ensure sufficient DNA replication, which increases the likelihood of mutations occurring.

After the growth period, mutation rates would be assessed using established scientific techniques. In bacteria and yeast, mutations could be detected by observing changes in growth behavior, colony appearance, or resistance to specific substances. In mammalian cells, mutations could be identified through genetic analysis or by measuring changes in cell function. Data would be collected and recorded for each cell type and condition. The mutation rates observed in the high sugar environment would then be compared to those in the normal sugar environment to determine whether exposure to high sugar is associated with increased mutation rates in fast dividing cells.

Fast dividing cells exposed to high sugar environments show increased DNA damage and altered mutation behavior across different organisms.

In mammalian cells (human epithelial cells), high glucose increases transcription of DNA damage response (DDR) genes and is linked with severe DNA damage detected by comet assays when compared to lower glucose conditions, demonstrating genomic instability in high sugar environments. Likewise, other studies show that when mammalian renal epithelial cells are cultured in high glucose conditions, they have higher mutation rates and slower DNA repair, indicating sugar affects DNA maintenance pathways. Reviews of hyperglycemia also find high glucose inhibits DNA repair mechanisms while promoting DNA‑strand breaks in mammalian cells. Additionally, DNA damage markers such as γH2AX and oxidative adducts increase under hyperglycemic conditions in mammalian endothelial cells, linking high glucose to genomic stress.

In bacteria (Escherichia coli), sugars including glucose and fructose can modify and damage DNA directly, as shown by electrophoresis and transformation assays. Environmental studies also show that higher glucose concentrations influence mutation spectra and rates in E. coli populations, demonstrating that nutritional environment affects mutation outcomes.

In yeast (Saccharomyces cerevisiae), mutation rate experiments show that yeast grown on variable carbon sources exhibit significant differences in mutation rates due to metabolic shifts, indicating that sugar availability likely changes mutation frequency via altered cellular respiration and ROS production. Reviews on sugar‑induced cell death further show that high glucose induces ROS and DNA fragmentation in yeast cells, indicating sugar‑dependent genomic stress. Together, these sources show high sugar environments affect DNA damage and mutation processes in mammalian cells, bacteria, and yeast.

Experimental evidence shows that high sugar environments can increase DNA damage and mutation rates in fast-dividing cells. In mammalian cells (human epithelial cells — mammalian cells), Rahmoon et al., 2023 reported that high glucose increases DNA damage and activates DNA damage response (DDR) genes, as detected by comet assays. (Source: Rahmoon et al., 2023) Zhong et al., 2018 also observed that renal epithelial cells cultured in high glucose accumulate more mutations and show slower DNA repair, demonstrating sugar affects DNA maintenance. (Source: Zhong et al., 2018) Termini 2019 noted that hyperglycemia inhibits DNA repair and promotes mutagenesis in mammalian cells. (Source: Termini 2019) Lee et al., 2016 further supports this by showing increased mutation frequency in mammalian cell lines under high glucose conditions. (Source: Lee et al., 2016) Thno.org 2025 measured markers like γH2AX and 8-oxo-dG in high glucose conditions, indicating oxidative DNA damage in mammalian cells. (Source: Thno.org, 2025) In bacteria (Escherichia coli — bacterium), Levi & Werman, 2001 demonstrated that fructose causes DNA modification and damage, while PMC 2005 showed that glucose concentrations influence mutation types and overall mutation rate, including GC→TA transversions. (Sources: Levi & Werman 2001; PMC 2005) The Luria–Delbrück experiment (1943) supports the idea that environmental conditions, such as nutrient availability, affect mutation occurrence in bacteria. (Source: Luria–Delbrück, 1943) In yeast (Saccharomyces cerevisiae — yeast), PMC 2007 found that mutation rates vary depending on carbon source, with high glucose increasing mutation frequency. (Source: PMC 2007) PMC 2003 SICD experiments reported that high glucose induces ROS and DNA fragmentation in yeast, providing evidence of sugar-induced genomic stress. (Sources: PMC 2003 SICD; PMC 2003 SICD experiment) The PMC 2022 yeast review also emphasizes that sugar environment affects yeast mutation accumulation, supporting these findings. (Source: PMC 2022) Overall, these studies show that high sugar environments increase DNA damage and mutation rates across mammalian cells, bacteria, and yeast, demonstrating the effect of sugar on genomic stability. (Sources: Frontiers 2025; Fortune Journals 2025)

Taken together, evidence from mammalian cell culture studies, bacterial experiments, and yeast models consistently shows that high sugar environments increase DNA damage and influence mutation rates or genomic instability. Mammalian studies find direct increases in DNA damage and impaired repair under high glucose, bacterial research shows DNA damage and mutation spectrum changes with sugar exposure, and yeast data link environmental carbon sources with mutation frequency changes and oxidative stress. These collectively support the conclusion that high sugar environments promote increased DNA damage and mutation rates in fast‑dividing cells across kingdoms of life.

Mammalian Cells

1. Rahmoon, M., et al. (2023). High glucose increases DNA damage and DDR gene expression in human mammary cells. MDPI.
2. Zhong, Y., et al. (2018). Renal epithelial cells cultured in high glucose accumulate more mutations and have slower DNA repair. PMC.
3. Termini, C. M. (2019). Hyperglycemia inhibits DNA repair and promotes mutagenesis in mammalian cells. ASCOpost.
4. Lee, S., et al. (2016). High glucose increases mutation frequency in mammalian cell lines. PMC.
5. Thno.org. (2025). Hyperglycemia increases markers γH2AX, 8-oxo-dG indicating DNA damage in endothelial cells. Thno.org.

Bacteria (E. coli)

1. Levi, S., & Werman, R. (2001). Fructose causes DNA modification and damage in Escherichia coli. PubMed.
2. PMC 2005. Glucose concentration influences mutation types and overall mutation rate in E. coli. PMC.
3. Luria, S. E., & Delbrück, M. (1943). Mutations arise randomly in bacteria, influenced by environment. Genetics, 28, 491–511.

Yeast (Saccharomyces cerevisiae)

1. PMC 2007. Mutation rates vary with carbon source; high glucose increases mutation frequency. PMC.
2. PMC 2003. Sugar-Induced Cell Death: High glucose induces ROS and DNA fragmentation in yeast. PMC.
3. PMC 2003. Glucose causes rapid yeast cell death and DNA fragmentation. PMC.
4. PMC 2022. Yeast mutation accumulation is affected by sugar environment. PMC.

General DNA Damage Mechanisms

1. Wikipedia. (n.d.). 8-oxo-2'-deoxyguanosine. Retrieved March 2026, from https://en.wikipedia.org/wiki/8-oxo-2'-deoxyguanosine
2. Fortune Journals. (2025). DNA glycation from sugar leads to DNA damage and mutagenesis. Fortune Journals.
3. Frontiers in Cell Death. (2025). Sugar stress causes ROS and DNA fragmentation in yeast and mammalian cells. Frontiers in Cell Death.

All the researchers and lab institutions that helped contribute to our project as well as all of our family, friends, and teachers who supported us and believed in us.