SupplementsOmega-3 (Fish Oil)
Fatty Acids
The long-chain omega-3 fats EPA and DHA (from oily fish or fish oil) are anti-inflammatory and support heart and brain health. Research on cancer prevention is mixed, but omega-3s may help reduce inflammation and support appetite and muscle during treatment.
- Anti-inflammatory fats that may help counter the chronic inflammation linked to cancer growth.
- May help preserve weight, muscle and appetite during treatment (studied in cancer-related cachexia).
- Well established for heart and brain health as part of a balanced diet.
Aim for 2 servings of oily fish weekly (salmon, sardines, mackerel). If using fish oil, a modest dose (~1 g EPA+DHA/day) is typical.
Can thin the blood — important around surgery or if you take blood thinners, so clear it with your oncologist. Large doses may cause stomach upset. Prevention evidence is mixed; not a proven cancer treatment.
Learn more from trusted sources
- American Cancer Society — NutritionEating well during and after cancer treatment.
- American Institute for Cancer Research (AICR)Evidence-based cancer-prevention diet and lifestyle guidance.
- National Cancer Institute — NutritionNutrition in cancer care (U.S. NIH).
- World Cancer Research Fund (WCRF)Global research on diet, activity and cancer.
- Cancer Research UK — Diet & CancerManaging diet and eating problems during treatment.
This information is educational and may support wellbeing — it is not medical advice and never a promise of a cure. Always consult your oncology care team before changing diet, supplements, or medication.