Ginger does appear to lower blood pressure, though the effect is modest. A systematic review and meta-analysis of clinical trials found that ginger supplementation reduced systolic blood pressure by an average of about 6 mmHg and diastolic blood pressure by about 2 mmHg. That’s a meaningful shift, roughly comparable to what some people achieve through other dietary changes like reducing sodium, but it’s not a replacement for medication if you have diagnosed hypertension.
How Ginger Affects Blood Pressure
Ginger contains phenolic compounds that work on blood vessels in ways similar to a common class of blood pressure medications called calcium channel blockers. These drugs relax the walls of blood vessels, making it easier for blood to flow and reducing the pressure against artery walls. Animal studies show that ginger has a dose-dependent effect on blood pressure: more ginger produces more relaxation of blood vessels.
Ginger also appears to inhibit an enzyme called ACE, which the body uses to produce a hormone that constricts blood vessels. This is the same enzyme targeted by ACE inhibitors, another widely prescribed category of blood pressure medication. On top of that, ginger acts as an antioxidant, helping to prevent damage to blood vessel linings that can contribute to stiffness and elevated pressure over time.
What the Clinical Evidence Shows
The most comprehensive look at ginger and blood pressure comes from a meta-analysis published in 2019 that pooled data from multiple clinical trials. Across those studies, ginger supplementation was associated with a 6.36 mmHg drop in systolic pressure (the top number) and a 2.12 mmHg drop in diastolic pressure (the bottom number). Both results were statistically significant, meaning they were unlikely to be due to chance.
One well-designed trial gives a clearer picture of what to expect over time. Researchers gave participants with type 2 diabetes either 3 grams of ginger powder daily (split into three doses) or a placebo for eight weeks. Blood pressure was measured at baseline, then at weeks 2, 4, 6, and 8. The ginger group saw systolic pressure drop from an average of about 127 mmHg to 109 mmHg by the end of the study, with diastolic pressure falling from 74 to 66 mmHg. The placebo group showed no similar change.
It’s worth noting that these participants already had a chronic health condition, and results in otherwise healthy people may differ. The meta-analysis also showed high variability between studies, meaning some trials found larger effects and others found smaller ones. Your individual response will depend on factors like your starting blood pressure, overall diet, and health status.
How Long It Takes to Work
Based on the available trials, you shouldn’t expect overnight results. The eight-week trial measured blood pressure at multiple time points and found that the most significant reductions showed up by the end of the full eight weeks. Some improvement appeared earlier, but the clearest, most consistent drops came with sustained daily use over two months. If you’re adding ginger to your routine for blood pressure purposes, plan to give it at least that long before evaluating whether it’s making a difference.
Fresh Ginger vs. Supplements
Fresh ginger root contains higher concentrations of gingerol, the compound most closely linked to ginger’s health effects, compared to dried or powdered forms. That said, clinical trials have primarily used powdered ginger in capsule form because it’s easier to standardize dosing. The trial showing significant blood pressure reductions used 3 grams of ginger powder per day.
If you prefer fresh ginger, a rough conversion is that one teaspoon of freshly grated ginger equals about a quarter teaspoon of powdered ginger. So hitting the equivalent of 3 grams of powder through fresh root would mean incorporating a generous amount into your daily cooking or drinks. Ginger tea, stir-fries, and smoothies are all practical ways to do this, though it can be harder to track exactly how much you’re consuming compared to taking a measured supplement.
Side Effects and Risks
At typical dietary amounts, ginger is well tolerated. At higher doses, the most common side effects are gastrointestinal: abdominal discomfort, heartburn, diarrhea, and irritation in the mouth and throat. These tend to be mild and dose-related, meaning they’re more likely if you’re taking concentrated supplements rather than adding fresh ginger to food.
The more serious concern involves drug interactions. Ginger can increase the blood-thinning effect of warfarin, potentially raising the risk of bleeding. It also inhibits platelet aggregation on its own, so combining it with antiplatelet medications (often prescribed after heart attacks or strokes) can compound bleeding risk. If you take blood thinners of any kind, this is a combination to discuss with your prescriber before starting regular ginger supplementation.
Ginger can also lower blood sugar, which matters if you’re on diabetes medication. The combination could push blood sugar too low. And in a small number of cases, ginger has been associated with heart rhythm irregularities. People who already have arrhythmias or are on medications that affect heart rhythm should be cautious. Finally, ginger increases bile acid secretion, which can be a problem if you have gallstones.
Ginger in the Bigger Picture
No major health organization currently recommends ginger as a standalone treatment for high blood pressure. The American Heart Association’s dietary recommendations for hypertension focus on the DASH diet, sodium reduction, potassium intake, and weight management. Ginger doesn’t appear in those guidelines as a specific intervention.
That doesn’t mean it’s useless. A 6 mmHg reduction in systolic pressure is clinically relevant, especially for someone in the prehypertension range (120 to 139 systolic) who is trying to avoid medication through lifestyle changes. Stacking ginger with proven strategies like reducing sodium, exercising regularly, and eating more fruits and vegetables could add up to a meaningful overall reduction. But if your blood pressure is already in a range where your doctor has recommended medication, ginger alone is unlikely to bring it under control.