Evidence checked: 19 July 2026
Written by Charles Gumbley, BHSc (Clinical Nutrition), DipHSc (Western Herbal Medicine).
Most supplements for heart health have not been shown to prevent a heart attack or stroke in people who already eat an adequate diet. Australian guidance says there is no strong evidence that routine vitamin, herbal or mineral products provide heart benefits, and advises against using them to prevent heart problems unless a GP prescribes them.[1]
A clinician may still prescribe a specific formula for a confirmed deficiency or other defined indication. That differs from choosing a general heart formula.
Medical disclaimer: This article is general education, not personalised medical advice. Do not start, stop or replace heart medicines or non-prescription products without advice from your GP, cardiologist or pharmacist.
Emergency: Chest pain that is severe, worsening or lasts 10 minutes can be a heart attack. Call Triple Zero (000) for an ambulance. Do not drive yourself.[2]
Do supplements prevent cardiovascular disease?
Evidence depends on the product, population and health outcomes. An effect on a blood vessel, heart muscle, LDL cholesterol levels or triglyceride levels does not prove a lower risk of heart disease or risk of stroke. Prevention also differs from treatment after heart disease has been diagnosed.
For most people, high blood pressure, high cholesterol, smoking, diabetes, movement and the overall eating pattern matter more than a supplement stack. Continue prescribed heart medicines because they reduce the risk of future problems.[1]
Fish oil and omega-3 supplements
Fish oil supplements are not equivalent to eating fish. Australian guidance recommends food sources of marine fats and says a supplement may be beneficial for some people with existing coronary heart disease or high triglycerides, with medical advice.[3]
A large Cochrane review found that increasing long-chain marine fats had little or no effect on all-cause mortality, heart events, stroke or abnormal heart rhythm overall.[4] Prescription treatment for selected results differs from an over-the-counter dietary supplement. Do not assume more is better or combine it with heart medicines without review.
Vitamin and mineral supplements and antioxidant vitamins
Multivitamins, vitamin D supplements, vitamin E, B vitamins and antioxidant combinations are marketed as vitamins for heart health. A systematic review found no heart benefit for these vitamin supplements, beta-carotene, calcium or selenium; antioxidant mixtures and niacin used with a statin showed possible harm in some outcomes.[5]
Correcting a confirmed deficiency may still be appropriate. That is not evidence that routine supplementation prevents heart disease in everyone. High-dose vitamin products can cause toxicity or medicine interactions.
CoQ10 and other common supplements
Coenzyme Q10, magnesium, garlic, turmeric and plant sterols are often described as good for heart health. Marketing a change in heart function as beneficial for heart health does not prove prevention of heart attack and stroke. CoQ10 should not replace a statin, blood-pressure medicine or heart-failure treatment.
A GP or pharmacist should assess the aim, diagnosis, organ function, medicines and exact formulation. The right supplements depend on individual health needs; none should be a do-it-yourself statin substitute.
Eating a heart-healthy diet
The recommended pattern emphasises vegetables, fruit, wholegrains, legumes, nuts, seeds, fish, healthy oils and herbs or spices instead of salt.[6] It targets risk factors together. Regular activity, not smoking and managing alcohol, cholesterol and diabetes support your heart health and overall health and can help lower blood pressure.
Ask your GP about a Heart Health Check if you are 45 or older, or 30 or older if you are Aboriginal or Torres Strait Islander.[6]
Taking supplements with heart medicines
Over-the-counter does not mean interaction-free. These health products can alter medicines used for blood pressure, cholesterol, blood clots, heart rhythm and congestive heart failure. They can also duplicate ingredients or contain sodium that is unsuitable for some people.[1]
Keep a current list of medicines and non-prescription products. Show the exact labels to a GP or pharmacist before use, and never stop prescribed treatment because a product promises a “natural” alternative.
Heart health vitamins and supplements: common questions
What is the best supplement for overall heart health?
There is no universal answer. Improved heart health usually comes from a heart-healthy eating pattern and disease-risk management. A clinician may prescribe a specific product for a confirmed need.
How can I improve my heart health fast?
There is no safe quick fix. Arrange a blood-pressure, cholesterol and overall heart-disease risk review; act on smoking, movement, food and prescribed treatment. Call 000 for possible heart-attack symptoms.
Do cardiologists recommend supplements?
Not routinely for prevention. Australian guidance advises using these products for this purpose only when prescribed. Individual recommendations may apply to a deficiency, high triglycerides or established disease.[1,3]
What are the 7 superfoods for your heart?
No seven foods can guarantee a healthy heart. A repeatable eating pattern containing plants, wholegrains, healthy proteins and unsaturated fats is more useful than a ranked list.[6]
References
- Heart Foundation Australia. Heart medicines: frequently asked questions. Checked 19 July 2026.
- Healthdirect Australia. Chest pain. Checked 19 July 2026.
- Omega fats and heart health. Australian cardiovascular guidance; checked 19 July 2026.
- Abdelhamid AS, et al. Omega-3 fatty acids for the primary and secondary prevention of cardiovascular disease. Cochrane Database of Systematic Reviews. 2020;3:CD003177. doi:10.1002/14651858.CD003177.pub5. PubMed
- Jenkins DJA, et al. Supplemental Vitamins and Minerals for CVD Prevention and Treatment. Journal of the American College of Cardiology. 2018;71:2570–2584. doi:10.1016/j.jacc.2018.04.020. PubMed
- Keep your heart healthy. Australian cardiovascular guidance; checked 19 July 2026.
Evidence checked: 19 July 2026. General information only; it does not replace care from a GP, cardiologist, pharmacist or Accredited Practising Dietitian.
