Surviving cancer is a major milestone, but many individuals face ongoing health challenges after treatment. One common concern is high cholesterol, which can increase the risk of cardiovascular disease over time. Managing cholesterol in cancer survivorship requires a careful and balanced approach, as nutritional needs may differ from the general population. While supplements can play a supportive role, long-term health outcomes are still primarily influenced by overall lifestyle, dietary habits, and appropriate medical care. 

Why Cholesterol May Increase After Cancer 

High cholesterol after cancer treatment is relatively common and are often influenced by a range of physiological, treatment-related, and lifestyle factors beyond dietary intake alone. Certain treatments, including hormonal therapies used in breast or prostate cancer, can affect lipid metabolism (Scheinberg et al., 2023). Reduced physical activity during and after treatment, changes in body composition, and weight gain can also contribute to elevated cholesterol levels (Perrone et al., 2021). In some cases, metabolic changes caused by the disease or its treatment may further complicate cholesterol control. Understanding these factors helps survivors approach the issue with realistic expectations and appropriate strategies. 

Supplement & Nutrition Considerations 

When it comes to supplements, a targeted and cautious approach is essential. Soluble fiber, such as psyllium husk or oat beta-glucan, is one of the most effective and safest options for lowering LDL cholesterol and supporting gut health (Alahmari, 2024). Omega-3 fatty acids, particularly from food sources like fatty fish, may help improve triglyceride levels and support heart health, although supplements should only be used when necessary and with professional guidance (Krupa et al., 2024). Plant sterols and stanols can also help reduce cholesterol absorption, contributing to modest improvements in LDL cholesterol levels (Barkas et al., 2023). 

It is important to note that cholesterol-lowering supplements should not replace prescribed treatment or a balanced, heart-healthy diet. Some products marketed for cholesterol management, such as red yeast rice or mixed herbal formulations, may have inconsistent quality, variable dosing, and potential interactions with medications (Farkouh & Baumgärtel, 2019). Therefore, any supplement use should be discussed with a healthcare professional to ensure it is safe and appropriate within an overall cholesterol management plan. 

Supplement Recommendations:

1. Fish Oil (Omega-3 Fatty Acids) 

• May help support cardiovascular health in cancer survivors, particularly by reducing elevated triglyceride levels often seen after treatment 

• Provides anti-inflammatory benefits, which may be helpful during post-cancer recovery  

• Can be considered when intake of omega-3 rich foods (e.g. fatty fish) is insufficient in the diet  

• Dosage should be carefully monitored, particularly for individuals taking blood-thinning medications, due to potential increased bleeding risk  

(Chiu et al., 2025) 

2. Coenzyme Q10 (CoQ10) 

• Supports heart health and cellular energy production, which may be relevant for cancer survivors experiencing fatigue or reduced vitality 

• May be beneficial for individuals on cholesterol-lowering medications (e.g. statins), as these can reduce natural CoQ10 levels in the body 

• Generally well tolerated, but use should be individualised based on medical history and current medications  

• Intended as supportive care rather than a primary strategy for cholesterol management or cancer recovery 

(Dabaghi et al., 2024) 

3. Soluble Fiber (e.g. Psyllium, Oat Beta-Glucan) 

• One of the most well-supported dietary strategies for lowering LDL (bad cholesterol), which is important for long-term cardiovascular health in cancer survivors 

• Works by reducing cholesterol absorption in the gut through bile acid binding, helping improve overall lipid profiles 

• Supports gut health, which may be beneficial for cancer survivors who experience digestive changes after treatment 

• Can be safely used long term when introduced gradually with adequate fluid intake to minimise gastrointestinal discomfort 

(Ghavami A et al., 2023) 

Diet Recommendations 

A heart-healthy and cancer-supportive diet should focus on consistency, balance, and supporting healthy cholesterol levels. Emphasis should be placed on foods that help lower LDL (bad cholesterol) and support overall cardiovascular health. Whole grains such as oats, barley, brown rice, and quinoa are particularly beneficial as they are rich in soluble fiber, which helps reduce cholesterol absorption and improve lipid profiles. Lean protein sources, including fish, legumes, tofu, and skinless poultry, support muscle maintenance and recovery without contributing excess saturated fat. Healthy fats from olive oil, nuts, seeds, and fatty fish should be included in moderation, as they help improve HDL (good cholesterol) levels and support heart health. At the same time, intake of saturated fats, trans fats, processed foods, and sugars should be limited, as these can raise LDL cholesterol and increase cardiovascular risk. 

For cancer survivors with high cholesterol, the most effective strategy is a balanced, food-first approach supported by healthy lifestyle habits. While certain supplements such as soluble fiber, omega-3 fatty acids, and plant sterols may offer additional benefits, they should be used thoughtfully and not as a primary solution. Long-term health is best achieved through consistent dietary patterns, regular physical activity, and appropriate medical care, while supplements can be incorporated as part of a well-rounded health strategy. 

References 

1. Scheinberg, T., Mak, B., Butler, L., Selth, L., & Horvath, L. G. (2023). Targeting lipid metabolism in metastatic prostate cancer. Therapeutic Advances in Medical Oncology, 15, 17588359231152839. https://doi.org/10.1177/17588359231152839 

2. Perrone, M. A., Feola, A., Pieri, M., Donatucci, B., Salimei, C., Lombardo, M., Perrone, A., & Parisi, A. (2021). The Effects of Reduced Physical Activity on the Lipid Profile in Patients with High Cardiovascular Risk during COVID-19 Lockdown. International Journal of Environmental Research and Public Health, 18(16), 8858. https://doi.org/10.3390/ijerph18168858 

3. Alahmari, L. A. (2024). Dietary fiber influence on overall health, with an emphasis on CVD, diabetes, obesity, colon cancer, and inflammation. Frontiers in Nutrition, 11, 1510564. https://doi.org/10.3389/fnut.2024.1510564 

4. Krupa, K. N., Fritz, K., & Parmar, M. (2024, February 28). Omega-3 fatty acids. StatPearls – NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK564314/#:~:text=Lipoprotein%20lipase%20(LPL)%20is%20an,oxidation%20during%20rest%20and%20exercise. 

5. Barkas, F., Bathrellou, E., Nomikos, T., Panagiotakos, D., Liberopoulos, E., & Kontogianni, M. D. (2023). Plant sterols and plant stanols in cholesterol management and cardiovascular prevention. Nutrients, 15(13), 2845. https://doi.org/10.3390/nu15132845 

6. Chiu, H., Zhuang, S. R., Shen, Y., Thangaleela, S., & Wang, C. (2025). A prospective interventional study on the beneficial effect of Fish Oil-Enriched High-Protein Oral Nutritional Supplement (FOHP-ONS) on malnourished older cancer patients. Nutrients, 17(15), 2433. https://doi.org/10.3390/nu17152433 

7. Farkouh, A., & Baumgärtel, C. (2019). <p>Mini-review: medication safety of red yeast rice products</p> International Journal of General Medicine, Volume 12, 167–171. https://doi.org/10.2147/ijgm.s202446 

8. Dabaghi, G. G., Rad, M. R., Mohammad-Zamani, M., Shervedani, A. K., Bahrami-Samani, F., & Heshmat-Ghahdarijani, K. (2024). The role of coenzyme Q10 as a preventive and therapeutic agent for the treatment of cancers. Current Problems in Cancer, 48, 101063. https://doi.org/10.1016/j.currproblcancer.2024.101063 

9. Ghavami A, Ziaei R, Talebi S, Barghchi H, Nattagh-Eshtivani E, Moradi S, Rahbarinejad P, Mohammadi H, Ghasemi-Tehrani H, Marx W, Askari G. Soluble Fiber Supplementation and Serum Lipid Profile: A Systematic Review and Dose-Response Meta-Analysis of Randomized Controlled Trials. Adv Nutr. 2023 May;14(3):465-474. doi: 10.1016/j.advnut.2023.01.005. Epub 2023 Feb 2. PMID: 36796439; PMCID: PMC10201678.