Yes, garlic may help lower blood pressure. Its active sulfur compounds can support the relaxation and widening of blood vessels, reduce sodium and water retention, and help protect blood vessel walls from inflammation and oxidative damage.
Garlic appears to work mainly through compounds such as allicin and S-allyl cysteine. These substances may improve blood flow, reduce stiffness in the arteries, and support the body’s natural systems that help control blood pressure.
Raw, crushed garlic can be added to meals, sauces, and salads. Crushing it and waiting about 10 minutes before use may help preserve allicin, while boiling or cooking can reduce its formation. Garlic supplements have also been studied, but the amount and form vary, and benefits may take about 8 to 12 weeks of regular use.
Garlic should only complement prescribed blood pressure treatment, not replace it. Large amounts or supplements may cause stomach symptoms, low blood pressure, fast heartbeat, or increased bleeding risk, especially with blood thinners. Speak with a doctor or registered dietitian before starting a garlic supplement.