WASHINGTON — Cancer survivors who stuck most closely to a healthy diet faced a substantially lower risk of developing heart disease over the following decade, according to a large prospective study published on 29 October 2026 in JACC: Advances, a journal of the American College of Cardiology. The researchers also linked stronger adherence to healthy eating patterns with a longer life expectancy, by an estimated 1.66 to 3.32 years at age 45.
The study followed 8,716 cancer survivors in the United Kingdom's UK Biobank cohort who had no history of ischemic heart disease, heart failure or stroke when they entered the analysis. Over a median follow-up of 12.3 years, 1,116 participants experienced a first cardiovascular event — ischemic heart disease, heart failure or stroke. Comparing the highest with the lowest levels of adherence, the researchers reported hazard ratios of 0.65 for the Dietary Approaches to Stop Hypertension (DASH) diet and 0.63 for the Alternate Healthy Eating Index-2010 (AHEI-2010), which in this context mean roughly a one-third lower associated risk.
This article reports general research findings and is not medical advice. Anyone considering a change to their diet, especially during or after cancer treatment, should discuss it with their own clinician or dietitian first.
Illustration: A heart-healthy plate with vegetables, whole grains, legumes and fish — an artist's impression, not a photograph of a real person or meal.
What Happened
The study, led by Qing-Yuan Gao of Sun Yat-sen Memorial Hospital at Sun Yat-sen University in Guangzhou, China, set out to answer a question that matters more as cancer survival improves: after treatment, what protects the heart? Cancer survivors face a higher-than-average risk of cardiovascular disease, including people who were never exposed to treatments that can strain the heart, such as certain chemotherapy drugs or radiation. Whether healthy eating could help reduce that risk had been unclear.
To investigate, the team analysed UK Biobank data from cancer survivors who were free of cardiovascular disease at baseline and who had completed at least one web-based 24-hour dietary recall questionnaire. The participants' mean age was about 59 years, and about 62 percent were women. The most common cancer types were breast cancer (31.4 percent), prostate cancer (9.8 percent) and colorectal cancer (8.3 percent).
Using the questionnaire responses, the researchers scored each participant's adherence to eight common healthy dietary patterns: the Mediterranean diet, the Mediterranean-DASH Intervention for Neurodegenerative Delay (MIND) diet, AHEI-2010, DASH, a healthful plant-based diet index, a reversed energy-adjusted dietary inflammation index, a healthy low-carbohydrate diet and a healthy low-fat diet. The primary outcome was the first occurrence of ischemic heart disease, heart failure or stroke, identified through hospital inpatient records and death registers. The analyses adjusted for factors including age, sex, ethnicity, body mass index, physical activity, smoking, socioeconomic status, blood pressure, lipids, diabetes, age at cancer onset and a polygenic risk score for cardiovascular disease.
During the median 12.3 years of follow-up, the 1,116 cardiovascular events included 858 cases of ischemic heart disease, 251 cases of heart failure and 181 strokes, as reported in the study summaries. Seven of the eight dietary patterns showed a protective association with cardiovascular events. The exception was the healthy low-carbohydrate diet, for which no significant benefit was observed.
Background
Heart disease is one of the leading threats to long-term survival after cancer. Treatments can accelerate cardiovascular risk, and clinicians have warned that for some older survivors, cardiovascular problems can become a leading cause of death within a decade of diagnosis. At the same time, survivorship care has traditionally focused most closely on watching for cancer recurrence, leaving diet and heart health as a secondary concern for many patients.
The diets examined in the study share familiar features rather than a single branded menu. DASH emphasises vegetables, fruits, whole grains, low-fat dairy, fish, poultry, beans and nuts, while limiting sodium, added sugars and saturated fat. The Mediterranean pattern centres on plant foods, olive oil and fish. AHEI-2010 rewards higher intakes of vegetables, fruits, whole grains, nuts, legumes and fish, and lower intakes of sugary drinks, red and processed meat and sodium. An analysis of food groups in the study found that higher consumption of vegetables, whole grains, legumes, fish and dairy was each associated with lower overall cardiovascular risk.
The new findings build on a broader shift in cardio-oncology — the field that sits between cancer care and heart care — toward treating survivorship as a long-term health project, not just a period of monitoring. Diet is one of the few risk factors patients can influence every day, which is why researchers wanted to test, systematically, which eating patterns were most predictive of heart outcomes and life expectancy, rather than assuming all "healthy" diets behave the same way.
Illustration: A cancer survivor walking in a park with a companion — an artist's impression, not a photograph of a real person.
Why It Matters
The size of the associations is what makes the study notable. Comparing the top with the bottom quintile of adherence, the hazard ratio for total cardiovascular disease was 0.65 for DASH and 0.63 for AHEI-2010 — roughly a 35 percent and 37 percent lower associated risk, respectively. The Mediterranean diet (0.72) and the MIND diet (0.74) showed similar magnitudes of benefit. AHEI-2010 showed the strongest associations with lower risk of ischemic heart disease (0.63) and stroke (0.49), while DASH was most strongly associated with lower heart-failure risk (0.54).
Life expectancy told a complementary story. At age 45, participants with the highest adherence to healthy dietary patterns gained an estimated 1.66 to 3.32 additional years of life expectancy compared with those with the lowest adherence, with the MIND diet associated with the longest gain, at 3.3 years, and with the lowest risk of death from any cause. That combination — fewer heart events and longer life — suggests that diet after a cancer diagnosis is not only about general wellness, but may be part of protecting the heart itself.
The authors were careful about what the study can and cannot show. Because it was observational, it demonstrates associations, not proof that a particular diet directly causes the lower risk. Diet was assessed from 24-hour recall questionnaires rather than tracked continuously over the follow-up period, so changes in eating habits over time could not be captured. Cardiovascular events were identified through hospital and death records, which may underestimate the true incidence. And the UK Biobank cohort is predominantly white European with a healthy-volunteer bias, which may limit how far the results generalise to other populations.
Even with those caveats, the message for survivorship care is practical. Senior author Yang-Xin Chen, a clinician in the Department of Cardiology at Sun Yat-sen Memorial Hospital, said through the American College of Cardiology that implementing or maintaining a high-quality, heart-healthy diet such as the Mediterranean, DASH or MIND diet after a cancer diagnosis may have cardioprotective benefit and enhance overall survival. The study authors concluded that adherence to healthy dietary patterns is associated with reduced cardiovascular risk among cancer survivors, "underscoring the potential for diet to support cardio-oncology care."
What Happens Next
For clinicians, the findings add weight to including diet counselling in survivorship plans, alongside blood-pressure, cholesterol and blood-sugar management, physical activity and smoking cessation. For patients, the practical takeaway is not a single superfood or a rigid menu, but a pattern: more vegetables, whole grains, legumes and fish, less salt, sugary drinks and processed meat, sustained over years rather than weeks.
Researchers will now want to test whether the associations hold in more diverse populations, including people in lower-income countries and those treated with newer cancer therapies, and whether structured dietary support after diagnosis can change outcomes in randomised trials — the kind of evidence that observational studies alone cannot provide. Until then, the study gives survivors and their care teams a clearer, evidence-based reason to treat the dinner plate as part of long-term recovery, not an afterthought to it.
For health systems, the stakes are growing. As cancer survival continues to improve, the number of people living years or decades beyond a diagnosis keeps rising, and so does the importance of preventing the second disease — heart disease — that may ultimately threaten them most.
Illustration: A doctor and patient discussing a heart-health plan at a clinic desk — an artist's impression, not a photograph of a real consultation.
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FAQ
What did the new study find?
Cancer survivors who adhered most closely to healthy dietary patterns had a lower associated risk of heart disease over about 12 years of follow-up, with DASH and AHEI-2010 showing the strongest associations, and gained an estimated 1.66 to 3.32 years of life expectancy at age 45 compared with the lowest adherers.
Which diets performed best?
DASH (hazard ratio 0.65) and AHEI-2010 (0.63) were most strongly associated with lower total cardiovascular risk. The Mediterranean diet (0.72) and the MIND diet (0.74) showed similar benefits, while the healthy low-carbohydrate diet showed no significant benefit.
Who took part in the study?
The analysis included 8,716 cancer survivors from the UK Biobank who had no ischemic heart disease, heart failure or stroke at baseline, with a mean age of about 59 years. Breast, prostate and colorectal cancers were the most common types.
Does this prove that diet prevents heart disease after cancer?
No. The study was observational, so it shows associations rather than proof of cause and effect. Diet was measured by recall questionnaires, not tracked continuously, and the cohort was predominantly white European, which may limit generalisability.
What should cancer survivors do with this information?
The findings support discussing a heart-healthy eating pattern — rich in vegetables, whole grains, legumes and fish — with a clinician or dietitian as part of survivorship care, rather than adopting any restrictive diet on the basis of a single study.
Sources
- American College of Cardiology, "Healthy Diet May Lower Heart Disease Risk After Cancer," press release, 29 October 2026 (study: Gao, Gao, Liao et al., "Healthy Dietary Patterns and Incident Cardiovascular Disease in Cancer Survivors: A Prospective Cohort Study," JACC: Advances, published online 29 October 2026, doi:10.1016/j.jacadv.2026.103376).
- Medscape, "Healthy Diet May Curb Heart Disease Risk in Cancer Survivors," 29 October 2026.
- Healio, "Healthy eating may help cancer survivors live longer," 30 October 2026.
- Scimex / American College of Cardiology, "A wholesome diet may help keep cancer survivors' hearts healthy," 30 October 2026.
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