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Gut microbiota and nutrition proposed as integrated targets in colorectal cancer cardio-oncologyGut health and nutrition may impact colorectal cancer treatment
Frontiers in MedicinePublished September 19, 2026Study authors: Aibo Liu, Rui Tan, Xiaoli Zhou, Peng Wang, Xiao WangDOI ↗Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease
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Key Takeaway
Recognize that gut microbiota and nutrition in CRC cardio-oncology remain theoretical, not proven.
This systematic review addresses the intersection of gut microbiota, nutritional interventions, and cardio-oncology in colorectal cancer (CRC) management. The authors synthesize evidence suggesting that dysbiosis of the gut microbiota and abnormal nutritional metabolism play a key role in the occurrence and development of tumors. They also note that cardiovascular toxicity risks faced by CRC patients during radiotherapy, chemotherapy, targeted therapy, and immunotherapy have become increasingly prominent.
The review proposes a theoretical basis for integrating gut microbiota and nutrition insights into multidisciplinary comprehensive treatment strategies for CRC. However, no pooled effect sizes, sample sizes, or specific outcome data are reported, and the review does not provide quantitative estimates for any of its main findings.
The authors acknowledge a key limitation: a lack of systematic integration regarding the mechanisms underlying the interplay between the gut microbiota, nutritional interventions, and cardio-oncology in the management of CRC. Funding sources and conflicts of interest are not reported.
Given the absence of quantitative synthesis and the narrative nature of the mechanistic claims, this review should be interpreted as hypothesis-generating. It does not provide direct evidence that modifying gut microbiota or nutrition reduces cardiovascular toxicity or improves CRC outcomes. Clinicians should recognize that the proposed integration remains theoretical and has not been validated in prospective studies.
How this fits prior evidence
This review extends prior coverage of gut microbiota in colorectal cancer, which noted that microbiota influence innate immune signaling and promote colibactin-associated mutational signatures, though human longitudinal causal evidence remains limited. It also aligns with prior coverage of cardiovascular toxicity as a growing concern in cancer therapy, though that specific topic was not previously covered. The review's focus on nutritional interventions adds a new dimension not addressed in prior items on screening intervals, sex-tailored screening, AI-assisted colonoscopy, or exercise during neoadjuvant chemotherapy. It does not confirm or contrast with those findings directly.
When a person faces a colorectal cancer diagnosis, the road ahead involves complex treatments like chemotherapy and radiation. New research highlights a critical connection between the body's internal environment and how these treatments affect the heart. Specifically, the study looks at how gut bacteria and nutrition impact the development of tumors.
Researchers found that an imbalance in gut bacteria, known as dysbiosis, and abnormal nutritional metabolism are key factors in how colorectal cancer develops. This suggests that the health of your microbiome is a significant piece of the puzzle in understanding the disease.
There is also a growing concern regarding heart health. Patients undergoing standard treatments like chemotherapy, radiation, and immunotherapy face increasing risks of cardiovascular toxicity. While the research shows these links are important, it notes that we still need more integrated information on how to combine gut health and nutrition into daily treatment plans.
What this means for you:
Gut bacteria and nutrition are linked to cancer development and heart risks during cancer treatment.
Common questions
How does gut health affect colorectal cancer?
An imbalance in gut bacteria, called dysb_iosis, and abnormal nutritional metabolism are key factors in the occurrence and development of tumors. This means the health of your gut microbes is linked to how the cancer develops in the body.
Are there heart risks with cancer treatments?
Yes, patients with colorectal cancer face increasing risks of cardiovascular toxicity. These risks are seen in patients undergoing radiotherapy, chemotherapy, targeted therapy, and immunotherapy.
How can nutrition help in treatment?
The research suggests that understanding the link between gut microbiota and nutritional metabolism provides a basis for creating better, multi-layered treatment plans for patients with colorectal cancer.
As one of the most common malignant tumors worldwide, the pathogenesis of colorectal cancer (CRC) was complex. Recent studies have revealed that dysbiosis of the gut microbiota and abnormal nutritional metabolism played a key role in the occurrence and development of tumors. With the rapid development of cardio-oncology, the cardiovascular toxicity risks faced by CRC patients during radiotherapy, chemotherapy, targeted therapy, and immunotherapy have become increasingly prominent, emerging as a key factor affecting long-term patient outcomes. However, there was currently a lack of systematic integration regarding the mechanisms underlying the interplay between the gut microbiota, nutritional interventions, and cardio-oncology in the management of CRC. This article aims to review the mechanisms underlying the interaction between CRC and the gut microbiota, the effects of nutritional interventions on the gut microbiota and tumor progression, and the important role of cardio-oncology in the treatment of CRC. This review examines the emerging evidence on how gut microbiota and nutrition interact to influence CRC development, progression, and therapeutic response, and proposes a theoretical basis for integrating these insights into multidisciplinary comprehensive treatment strategies.
