Sugary Drinks and Cancer Spread

Sugar-Sweetened Beverages and Cancer Progression: What the Science Reveals

Sugary drinks like soda and energy drinks may accelerate colorectal cancer spread, according to MD Anderson research

Sugary drinks may accelerate cancer spread, study finds / Freepik

We all know sugary drinks aren’t healthy. But new research suggests they may do more than just add calories — they might help cancer spread. In this article, you’ll find clear, science-backed explanations of how sugar-sweetened beverages (SSBs) could impact cancer progression, especially in colorectal cancer. We'll break down complex biology into plain language, explore what studies show, and discuss what you can do with this knowledge.

1. What Are Sugar-Sweetened Beverages?

“Sugar-sweetened beverages” (SSBs) refers to any liquids to which free sugar (added sugar) has been added. Examples include sodas, soft drinks, many fruit drinks, energy drinks, sweetened coffees and teas, and nutritional supplement drinks. According to Wikipedia, added sugars include glucose, fructose, sucrose, high-fructose corn syrup, and more. The Wikipedia page also notes that while SSBs are indirectly linked to cancer risk through obesity, there is currently **no** definitive evidence that they directly cause cancer.
Still, the role of sugar in cancer development and progression has long been a topic of scientific interest.

2. The Breakthrough Finding: Sugar and Cancer Spread

In 2025, researchers from MD Anderson Cancer Center published a study in *Nature Metabolism* demonstrating that a combination of glucose and fructose — the sugar mix present in many SSBs — can enhance metastasis (the spread of cancer) in colorectal cancer (CRC) models. The key discovery: **the mixture** matters. Individually, glucose or fructose alone did not produce the same effect. The combination activated an enzyme called **sorbitol dehydrogenase (SORD)**, which altered cellular metabolism, promoting cellular movement, invasion, and liver metastasis in mouse and cell-culture experiments.

MD Anderson’s news release summarizes: only the sugar mix (glucose + fructose) increased cancer cell mobility, activated SORD, and triggered cholesterol pathways, ultimately pushing metastasis. Their press release frames the finding as the first direct experimental evidence linking SSB sugar mixtures to cancer spread in late-stage colorectal cancer.

3. How Does the Glucose + Fructose Mix Fuel Metastasis?

The researchers dug deep into mechanisms. Here’s a simplified walk-through:

**Polyol (sorbitol) pathway & SORD activation** In normal metabolism, the polyol pathway can convert glucose to sorbitol (via aldose reductase) and sorbitol to fructose (via SORD). Under a glucose + fructose environment, the reverse SORD reaction becomes activated, shifting cellular redox balance (reducing NADH to NAD⁺) and increasing sorbitol levels.
**NAD⁺/NADH ratio elevation** The shift in redox state supports enhanced glycolysis (sugar breakdown), which fuels cellular energy and metabolites needed for movement and invasion.
**Mevalonate (cholesterol synthesis) pathway activation** The extra metabolic flux channels into the mevalonate pathway (which leads to cholesterol and isoprenoid synthesis). This supports changes in membranes, signaling molecules, and motility machinery. The study showed that interfering with this pathway (e.g. with statins) dampened metastasis in their models.
**Migration, invasion, and metastasis increase** In cell assays, colorectal cancer (CRC) lines became more motile and invasive under glucose + fructose than glucose alone. In mice, those fed the sugar mix developed more liver metastases — a common site for CRC spread.

Genetic knockout experiments confirmed SORD’s central role: when SORD was disabled, the enhanced migration and metastasis effects disappeared, even in presence of the sugar mix. The study thus draws a causal line: sugar mix → SORD activation → metabolic reprogramming → more aggressive cancer behavior.

4. Why This Finding Matters Beyond the Lab

The study is preclinical (in cell lines and mouse models), so caution is needed in applying it directly to humans. Still, it has several significant implications:

**Diet matters even after diagnosis** Many recommendations focus on preventing cancer. This research suggests that once cancer exists, dietary sugar may influence how fast or aggressively it spreads — at least in CRC.
**Rethinking “nutritional support” drinks** Patients with cancer are often advised to use liquid nutrition supplements, protein shakes, or juices — many of which are high in sugars, often glucose + fructose. This study raises the question: could such liquids inadvertently promote metastasis in colorectal cancer?
**Potential new therapeutic targets** If SORD is central to the metastasis-promoting effect of sugar, inhibiting it might slow cancer spread. Similarly, using statins to block downstream cholesterol pathways showed effectiveness in reducing liver metastases in the mouse models.
**Public health guidance re-examined** Even if the human effects are more modest, the study reinforces calls to reduce SSB consumption — not just for obesity and diabetes prevention, but possibly for cancer control.

5. What We Know (and Don’t) From Human Epidemiology

The MD Anderson team noted that epidemiological studies have already shown associations between SSB intake and worse colorectal cancer outcomes — recurrence, mortality, and poorer survival — though causality was previously unclear. The new mechanistic work strengthens the plausibility of a causal link.

That said:

Observational studies can suffer from confounding (for example, people who drink more soda may have other unhealthy habits). Thus, while associations exist, they don’t prove sugar causes cancer progression directly.
Differences among individuals — genetics, cancer subtype, metabolic state, microbiome — mean effects will vary. Not every patient may be equally affected.
The new study has not yet been replicated in human clinical trials, so translation to patient care is premature.

6. Other Evidence Connecting Sugar, Metabolism & Cancer

Beyond this MD Anderson study, a broader body of literature supports the idea that sugar and metabolism are intimately linked to cancer. Some key lines of evidence:

The “Warburg effect” describes how many cancer cells favor glycolysis (sugar breakdown) even in presence of oxygen, consuming much more glucose than normal cells. This has long raised the question of whether excess sugar intake could help supply that demand. (Reviewed in multiple oncology/biochemistry texts.)
High intake of sugar and refined carbohydrates is linked to obesity, insulin resistance, chronic inflammation, and elevated insulin/IGF-1 levels — all of which are recognized risk factors for several cancers. D’après sources comme Harvard Health or NIH, chronic inflammation and hormonal dysregulation are pathways that can promote tumor development.
Some epidemiological studies link high sugar or SSB intake to increased risks of cancers of the liver, breast, pancreas, and others (often mediated via obesity). For example, a JAMA study found that daily SSB intake was associated with higher risk of liver cancer in older women.
While many cancer researchers caution that sugar does not “feed cancer” in a simplistic way, they do agree that sugar supply, metabolism, and systemic metabolic health are relevant factors.

Thus, the new MD Anderson findings fit into a larger, evolving picture: sugar metabolism is a piece of the puzzle in cancer biology, but not the whole story.

7. Practical Implications & What You Can Do

Given current knowledge — which is strong but still emerging — here are some evidence-informed strategies you might consider:

**Reduce or eliminate sugar-sweetened beverages** One of the simplest actionable steps is to avoid sodas, sugary fruit juices, energy drinks, and other beverages with added sugar (especially glucose + fructose). Water, unsweetened tea, and diluted fruit infusions are safer choices.
**Read labels carefully** Many “healthy” drinks, juices, and supplement beverages may have added sugars. Check for "sugar," "corn syrup," "glucose," "fructose," or other sweeteners on ingredient lists.
**Choose whole fruits over fruit juice** Whole fruits bring fiber, slower absorption, and other beneficial nutrients; juices often spike sugar levels rapidly.
**Discuss nutrition during cancer care** If you or a loved one is undergoing cancer treatment, ask your oncologist or dietitian which beverages and supplemental drinks are appropriate. It may be worthwhile to avoid high-sugar nutritional drinks (or choose low-sugar versions) especially in colorectal cancer.
**Stay active and manage metabolic health** Exercise, maintaining a healthy weight, avoiding insulin resistance, and managing blood sugar levels all support metabolic balance and may reduce cancer risk and progression.
**Follow research developments** Since this area is evolving quickly, keep an eye out for clinical studies testing SORD inhibitors, statin repurposing, or dietary interventions in cancer populations.

8. Limitations & Cautions

It’s important not to overinterpret findings. Some limitations and caveats include:

The study is **preclinical** (cells, mice) — human results may differ significantly.
The sugar exposure in mice or cell media may not perfectly reflect human consumption patterns (dose, timing, absorption, metabolism).
Cancer is complex, involving genetics, immune system, microbiome, environment, and treatment interactions — sugar is one factor among many.
Not all cancers are colorectal cancer; findings may not generalize to other cancer types.
Blocking SORD or mevalonate pathways could have side effects or unintended consequences; therapeutic targeting requires careful clinical testing.

9. Future Directions in Research

The MD Anderson work opens many potential avenues for researchers. Some key questions include:

Will observational and clinical studies in humans confirm the link between sugar intake and metastasis in colorectal cancer or other cancers?
Can SORD inhibitors be developed into safe drugs that slow cancer progression?
Will statins or other metabolic drugs be repurposed to reduce metastasis risk in patients with high sugar intake or high SORD expression?
What is the role of the tumor microenvironment (immune cells, stroma) and microbiota in sugar-driven metastasis?
How do individual differences (genetics, gut flora, dietary habits, comorbidities) modulate these effects?
Could similar mechanisms exist in other cancer types beyond colorectal cancer?

As new studies emerge, practitioners and patients alike will better understand whether and how to integrate sugar control into cancer therapy and survivorship plans.

FAQ — Frequently Asked Questions

Q1: Does sugar “feed” cancer?

Not in a simple sense. Cancer cells often consume more glucose (the Warburg effect), but ordinary sugar consumption does not directly cause cancer growth. However, excessive sugar intake can increase insulin, inflammation, and metabolic stress — factors that may support tumor growth. The new study suggests that sugar mixtures could even influence cancer spread under certain conditions.

Q2: Is this only relevant for colorectal cancer?

The detailed mechanistic study was done in colorectal cancer models. Whether similar effects apply to other cancers remains under investigation. Each cancer type has its own biology, metabolic demands, and vulnerabilities.

Q3: If I have cancer, should I avoid all sugar?

You don’t need to eliminate all sugar (that would be nearly impossible), but reducing added sugars — especially from beverages — is wise. Work with oncologists and dietitians to design a balanced diet that supports treatment, minimizes harmful sugar exposure, and ensures nutrition.

Q4: Could statins really help prevent metastasis?

In the mouse models, statins reduced liver metastases by interrupting the downstream cholesterol (mevalonate) pathway activated in sugar-exposed cancer cells. Whether that translates to humans is unknown and requires clinical trials. Until then, statins should only be used when medically indicated (e.g., for cholesterol or cardiovascular disease), not solely for cancer prevention.

Q5: How much sugary beverage intake is “risky”?

There is no established safe threshold in this context, especially given the complexity of individual metabolism and cancer risk. Public health guidance often recommends keeping added sugar to less than 10% of daily calories. In cancer care, the goal is to minimize unnecessary sugar exposure, especially from drinks.

Q6: How soon might human studies confirm these results?

Translating findings from preclinical models to humans typically takes years. Researchers must design observational studies, possibly randomized trials, and consider safety, confounding factors, and long-term follow up. However, given the significance of these early results, momentum is already building in the research community.

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