9 Herbs and Spices That May Help Lower Blood Pressure

Before modern medicine, herbs and spices were medicine. It turns out some of them actually hold up under clinical scrutiny. A landmark 2021 study from Penn State found that adding 6.6 grams (about 1.3 teaspoons) of a spice blend to meals daily lowered systolic blood pressure by about 2 mmHg in just four weeks. That may sound small, but at a population level, a 2 mmHg drop reduces stroke risk by 6-8%.

Here are nine herbs and spices with real evidence behind them.

Garlic: The Most Studied Natural BP Remedy

Garlic is arguably the most researched herb for blood pressure. A 2020 meta-analysis of 12 trials involving over 550 patients found that garlic supplements lowered systolic blood pressure by an average of 3.7 mmHg and diastolic by 3.4 mmHg. In studies limited to people with hypertension, the effect was larger – up to 8 mmHg systolic. The active compound, allicin, stimulates hydrogen sulfide and nitric oxide production, both of which relax blood vessels. Raw garlic is most potent, but aged garlic extract supplements are the most studied form. If you cook with garlic, crush it and let it sit for ten minutes before heating to maximize allicin formation. Why it matters for your metabolic age: even a 4-8 mmHg systolic drop from garlic could meaningfully shift your MetaAge score.

Cinnamon: Blood Sugar and Blood Pressure in One Spice

Cinnamon pulls double duty. Multiple studies show it lowers fasting blood sugar by 10-29 mg/dL, and a 2020 review in the journal Pharmacological Research found it reduces systolic blood pressure by about 3-5 mmHg. Ceylon cinnamon (true cinnamon) is preferred over cassia cinnamon because it contains less coumarin, a compound that can be hard on the liver in large doses. Sprinkle half a teaspoon on oatmeal, yogurt, or coffee daily. Why it matters for your metabolic age: since cinnamon supports both blood sugar and blood pressure, it targets two of the four inputs in the MetaAge calculator at once.

Basil: More Than a Pizza Topping

Basil contains eugenol, a compound that acts as a natural calcium channel blocker – the same mechanism used by some blood pressure medications. While most studies are preclinical, a 2019 trial found that holy basil (tulsi) reduced blood pressure and improved lipid profiles in participants over 12 weeks. Regular sweet basil shares some of these compounds. Use it generously in salads, sauces, and stir-fries. Fresh basil retains more of its active compounds than dried.

Turmeric: The Anti-Inflammatory Spice

Turmeric’s active compound, curcumin, is a potent anti-inflammatory. Chronic inflammation damages blood vessel walls and contributes to stiffness, which raises blood pressure. A 2019 meta-analysis found that curcumin supplementation significantly reduced both systolic and diastolic blood pressure, particularly in people with metabolic syndrome. Pair turmeric with black pepper, which increases curcumin absorption by up to 2000%. Add it to curries, scrambled eggs, or golden milk.

Cardamom: A Fragrant Pressure Reducer

A small but compelling study published in the Indian Journal of Biochemistry and Biophysics found that 3 grams of cardamom powder daily for 12 weeks lowered systolic blood pressure by about 5 mmHg. Cardamom appears to act as a diuretic, helping the body shed excess sodium and water. It also contains antioxidants that protect blood vessels. Add it to coffee, smoothies, oatmeal, or rice dishes. Why it matters for your metabolic age: cardamom’s diuretic effect helps address sodium retention, one of the most common drivers of elevated blood pressure readings.

Ginger: Circulation and Vascular Health

Ginger improves circulation by inhibiting an enzyme called angiotensin-converting enzyme (ACE), similar to how ACE inhibitor medications work. A 2019 review of six clinical trials found that ginger supplementation reduced systolic blood pressure by about 6 mmHg in people who consumed 3 or more grams daily. Fresh ginger in cooking, ginger tea, or adding grated ginger to smoothies are easy ways to increase your intake. Avoid candied ginger, which comes loaded with sugar.

Oregano: A Mediterranean Diet Secret Weapon

Oregano contains carvacrol, a compound that has shown blood-pressure-lowering effects in animal studies by reducing heart rate and widening blood vessels. While human trials are limited, oregano is a staple of the Mediterranean diet, which is strongly associated with lower blood pressure and better cardiovascular outcomes. Use fresh or dried oregano liberally in marinades, roasted vegetables, and soups. It also has antimicrobial properties that support gut health.

Celery Seed: An Underappreciated Remedy

Celery seed extract has been used in traditional Chinese medicine for blood pressure for centuries, and modern research is catching up. The compound 3-n-butylphthalide (NBP) relaxes smooth muscle in blood vessel walls. A small 2013 pilot study found that celery seed extract reduced systolic blood pressure over six weeks, though larger trials are needed to confirm the effect size. You can use celery seeds in soups, stews, and salad dressings, or find celery seed extract supplements.

Lavender: Calming for Your Nervous System and Blood Vessels

Lavender works primarily through the nervous system. Inhaling lavender essential oil has been shown to reduce cortisol levels and lower blood pressure acutely. A 2012 study found that lavender aromatherapy reduced systolic blood pressure by about 3.6 mmHg. While you would not sprinkle it on dinner, lavender tea and culinary lavender in baked goods are gaining popularity. Lavender essential oil in a diffuser at bedtime can also support the better sleep that helps blood pressure stay low overnight.

What Your Spice Rack Cannot Tell You

Herbs and spices are powerful additions to a blood-pressure-friendly diet, but they work best as part of the bigger picture. Your metabolic age – based on blood pressure, blood sugar, BMI, and age – gives you a single number that captures how all these factors work together.

Find out your metabolic age in 60 seconds – free at Penlago.