Turmeric and blood pressure: does curcumin lower or raise it?

Turmeric and its curcumin content, according to clinical studies, may slightly lower blood pressure rather than increase it. However, the effect is small, the study results are inconsistent, and curcumin cannot be considered a treatment for hypertension or a replacement for prescribed medications. In one of the most rigorous meta-analyses of 17 studies with 1,377 participants, curcumin, on average, produced no statistically significant change in either systolic or diastolic pressure. [1]

Another meta-analysis of 35 randomized trials found a small average reduction: approximately 2.0 mmHg for systolic and 0.8 mmHg for diastolic pressure. This discrepancy alone shows why the claim that "turmeric lowers blood pressure" requires qualification: the result depends on which studies, forms of curcumin, and patient groups were included in the analysis. [2]

In 2026, a more focused meta-analysis of patients with prediabetes and type 2 diabetes was published. In 15 randomized trials with 855 participants, turmeric or curcumin reduced systolic blood pressure by an average of 2.69 mmHg, and by approximately 3.41 mmHg in participants with baseline elevated blood pressure. No significant overall effect on diastolic blood pressure was found. These data are interesting, but they relate to a specific group of patients and do not allow us to conclude that the same effect will be observed in all people with hypertension. [3]

Therefore, the most accurate practical answer is this: turmeric does not generally raise blood pressure; concentrated curcumin preparations may lower blood pressure slightly in some people, but this effect is not predictable enough and is too small to use curcumin as a substitute for proven treatments for hypertension.

What research shows about the effects of curcumin on blood pressure

The evidence accumulated gradually and remained controversial for a long time. A 2019 meta-analysis pooled 11 studies with 734 participants and found no significant overall effect of turmeric or curcumin on systolic or diastolic blood pressure. Only studies lasting at least 12 weeks observed a small reduction in systolic blood pressure of approximately 1.24 mmHg. [4]

A larger 2023 meta-analysis with 17 studies and 1,377 participants found even less compelling results. The mean change in systolic pressure was only -0.06 mmHg, and diastolic pressure was -0.18 mmHg; both results were not statistically different from no effect. With use lasting at least 12 weeks, a small reduction in diastolic pressure of approximately 0.76 mmHg was observed, but the authors emphasized the need for further research. [5]

Almost simultaneously, another systematic review included 35 randomized trials and arrived at a more optimistic estimate: -2.02 mmHg for systolic and -0.82 mmHg for diastolic pressure. The researchers also found an improvement in one of the indicators of vascular endothelial function – flow-mediated vasodilation. [6]

This doesn't mean one meta-analysis is "correct" and another is wrong. Differences arise from different inclusion criteria, participant illnesses, treatment durations, doses, and forms of curcumin. Regular turmeric powder, purified curcuminoids, nanocurcumin, highly bioavailable preparations, and combinations with piperine have all been used. Because of this, the term "curcumin" effectively encompasses preparations with very different effects on the body. A larger 2025 review of meta-analyses also concluded that curcumin may have an effect on blood pressure, but the overall methodological strength of the accumulated reviews remains limited. [7]

What the most important general studies reveal

Study	Participants	Systolic pressure	Diastolic pressure	How to interpret
2019 meta-analysis	734	There is no significant overall effect.	There is no significant overall effect.	A slight effect may occur with long-term use.
Meta-analysis 2023	1377	-0.06 mmHg, insignificant	-0.18 mmHg, insignificant	There is no convincing effect in the general group.
2024 meta-analysis	35 studies	-2.02 mmHg	-0.82 mmHg	The effect is statistically significant, but small.
2026 meta-analysis on prediabetes and diabetes	855	-2.69 mmHg	-1.20 mmHg, insignificant	A more pronounced effect may occur in certain metabolic groups.

Sources: [8]

Can turmeric increase blood pressure?

There is no reliable clinical evidence that turmeric or curcumin systematically increases blood pressure. In randomized trials and meta-analyses, the direction of the effect is usually either neutral or slightly lowering. [9]

Therefore, claims found online that turmeric "constricts blood vessels and increases blood pressure" don't align with the overall picture of clinical studies. The other extreme—the claim that turmeric necessarily "normalizes blood pressure"—is also unsubstantiated. A significant proportion of study participants showed virtually no change in blood pressure. [10]

If your blood pressure increases significantly after starting a particular supplement, curcumin itself shouldn't be automatically blamed for the increase. Other ingredients in the supplement, dietary changes, caffeine, medications, stress, physical activity, and normal blood pressure variability are all factors. The mere fact of a temporal coincidence doesn't prove a cause-and-effect relationship.

Why curcumin can lower blood pressure at all

One of the most plausible mechanisms involves the endothelium, the inner layer of the vascular wall that plays a role in regulating vascular tone. An artery's ability to dilate in response to increased blood flow can be measured using flow-mediated vasodilation. The better the endothelium functions, the more effectively the vessel can change its diameter in response to physiological signals.

A meta-analysis of randomized trials showed an increase in flow-mediated vasodilation of approximately 1.49 percentage points after curcumin. However, other measures of vascular function, including pulse wave velocity, augmentation index, and endothelin-1 concentration, did not change significantly. Therefore, the data do point to a possible improvement in certain aspects of endothelial function, but not a universal effect on all vascular regulatory mechanisms. [11]

In a separate randomized trial of 39 healthy middle-aged and older adults, 12 weeks of highly bioavailable curcumin resulted in improved endothelium-dependent vasodilation. Experimental measurements suggested a possible role for increased nitric oxide availability and reduced oxidative stress. However, improvement in this intermediate vascular endpoint does not necessarily translate into proven prevention of heart attack, stroke, or hypertension. [12]

In a larger 2024 meta-analysis, flow-mediated vasodilation increased by an average of approximately 2 percentage points, along with a small reduction in blood pressure. However, pulse wave velocity, a measure of arterial stiffness, did not change significantly. This further suggests that curcumin's vascular effects should not be viewed as a simple "dilates blood vessels, therefore lowers blood pressure" mechanism. [13]

How significant is a decrease of 1-3 mmHg?

For an individual, this is a relatively small value. Fluctuations in blood pressure over the course of a day often significantly exceed a few millimeters of mercury. Blood pressure changes after physical activity, coffee, food, lack of sleep, stress, and even depending on the measurement technique.

This doesn't mean that a small average reduction in blood pressure across a large population is completely meaningless. But it's fundamentally different from a drug's ability to reliably control hypertension in a specific patient. If blood pressure, for example, is significantly above the target range, it's impossible to expect a few millimeters of curcumin's potential effect to solve the problem.

The 2024 European guidelines on high blood pressure and hypertension rely on evidence-based interventions: sodium reduction, a diet rich in healthy plant foods, physical activity, weight management, alcohol limitation, smoking cessation, and, when indicated, drug therapy. Turmeric or curcumin are not included in the standard treatments for hypertension. [14]

Turmeric in food and curcumin in capsules are not the same thing.

Most blood pressure-lowering data comes not from the typical amounts of turmeric used in food, but from dietary supplements or standardized preparations. Studies have used concentrated extracts, nanocurcumin, highly bioavailable forms, and gram-sized turmeric powder. [15]

Therefore, it's impossible to take the average blood pressure reduction from a meta-analysis of supplements and claim that a teaspoon of turmeric in rice or soup will produce the same result. The dose of curcuminoids, their bioavailability, and duration of action are completely different.

Regular turmeric in food, if well-tolerated, doesn't require exclusion from the diet simply because a person has high blood pressure. However, deliberately increasing its dosage in the hopes of treating hypertension is equally unfounded. Data on the therapeutic effect relate primarily to concentrated preparations, not to typical culinary amounts.

For whom the effect may be more noticeable?

The most interesting new data emerged for people with carbohydrate metabolism disorders. A 2026 meta-analysis included only patients with prediabetes or type 2 diabetes and found a mean reduction in systolic pressure of 2.69 mmHg. Among participants with baseline systolic pressure of at least 130 mmHg, the reduction was somewhat greater—about 3.41 mmHg. [16]

However, this analysis does not prove that curcumin is particularly effective for hypertension per se. People with diabetes differ in their metabolic status, vascular risk, body weight, and concomitant therapy. The results of this group cannot be automatically generalized to people without diabetes. The authors themselves characterize the effect as moderate and point to the need for more high-quality studies. [17]

A 2023 meta-analysis found small reductions in both blood pressure measures in a subset of studies that included women. Such subset results are interesting for designing new studies, but are less reliable than the pre-planned overall study result, so there is currently no basis for recommending curcumin specifically for blood pressure control in women. [18]

Does long-term use help more?

Some tests provide such a signal, but there is no definitive answer yet. A 2019 meta-analysis of studies lasting at least 12 weeks showed a small reduction in systolic pressure, which was not observed when all studies were combined. [19]

A 2023 study found a small reduction in diastolic pressure of approximately 0.76 mmHg after 12 weeks or more. However, a dose-response analysis did not confirm a statistically significant, consistent relationship between the duration of the course or the dose of curcumin and the degree of pressure reduction. This means it cannot be concluded that the longer or more curcumin taken, the lower the blood pressure. [20]

This is an important limitation for practical use. Prolonging the course or increasing the dose for blood pressure has no proven benefit, but the effects of the concentrated supplement on the body are enhanced.

Can curcumin lower blood pressure too much?

There is no convincing evidence that curcumin frequently causes clinically significant hypotension. Mean changes in blood pressure in meta-analyses are small, and some large analyses find no significant effect at all. [21]

However, people with low blood pressure to begin with or those well-controlled with multiple antihypertensive medications should evaluate the concentrated supplement with caution. If, after starting the supplement, dizziness, severe weakness, lightheadedness, or unusually low blood pressure occur, it's advisable to discontinue the supplement and discuss the situation with a doctor.

The composition of the drug is particularly important. Curcumin supplements often include piperine (from black pepper) to enhance bioavailability. Curcumin and piperine can affect enzymes and transport systems involved in drug metabolism. Data on clinically significant interactions in humans are still limited, so it cannot be said that the combination is necessarily dangerous, nor that it is guaranteed to be safe for any antihypertensive therapy. [22]

Can I take curcumin with blood pressure pills?

It is not recommended to independently change or reduce the dose of antihypertensive medications because of curcumin. Current hypertension guidelines are based on methods proven to reduce blood pressure and cardiovascular risk. For most patients with confirmed hypertension, European guidelines recommend both lifestyle changes and medication to lower blood pressure. [23]

For curcumin itself, direct clinical data on interactions with all major classes of antihypertensive drugs are insufficient. A review of pharmacokinetic interactions found potential effects of curcuminoids on cytochrome P450 enzymes and P-glycoprotein, but highlighted the large gap between laboratory experiments and confirmed interactions in humans. [24]

Therefore, a fixed rule like "take curcumin two hours after your blood pressure pill" doesn't solve the problem. If the interaction involves changes in enzyme activity or transport proteins, simply separating the capsules may not be sufficient. If you regularly take multiple cardiovascular medications, it's best to check the ingredients of each supplement with your doctor or pharmacist.

Can turmeric replace medication for mild hypertension?

No. Even for mildly elevated blood pressure, curcumin cannot be considered a proven alternative to standard treatment. Current European guidelines do allow for a period of medication-free lifestyle modification for some people with high blood pressure and low cardiovascular risk, but these guidelines focus on specific interventions with proven effectiveness—diet, salt reduction, physical activity, weight control, and other measures. [25]

If the blood pressure meets the criteria for hypertension, recommendations include confirming the diagnosis and usually combining lifestyle changes with medication. For most patients already receiving treatment, the recommended systolic blood pressure target in the 2024 European guidelines is 120–129 mmHg, if this level is well tolerated. [26]

Even the most favorable mean result of the curcumin meta-analysis—approximately 2-3 mmHg—is not comparable to the role of a comprehensive hypertension treatment program. Curcumin can be studied as a potential adjunctive intervention, but not as a replacement for therapy.

What's more important for blood pressure than curcumin?

For blood pressure control, the lifestyle changes listed in the European Society of Cardiology guidelines are much better supported: regular aerobic and strength training, reduced sodium intake, adequate dietary potassium, healthy eating, maintaining a normal body weight, not smoking, and limiting alcohol. [27]

The comparison itself demonstrates the scale of the evidence. For example, reducing salt intake has been studied in numerous randomized trials and has long been recommended, whereas for curcumin, meta-analyses even disagree on whether there is a reliable overall blood pressure-lowering effect. [28]

Therefore, it is wiser for a person with high blood pressure to first optimize their blood pressure measurements, lifestyle, and prescribed treatment, and then consider curcumin as an optional supplement if there is another legitimate purpose for it.

What to do if your blood pressure changes after taking curcumin

A single measurement is not sufficient to determine the effect of a supplement. It is advisable to repeat the blood pressure after several minutes of quiet rest, using the same technique. The American Heart Association also emphasizes that a single high reading should usually be rechecked, and a home blood pressure diary provides significantly more information than a single number. [29]

If, after starting the concentrated supplement, your blood pressure drops consistently below normal and dizziness, weakness, or pre-syncope occur, it's wise to temporarily discontinue the supplement and evaluate your other medications. Avoid voluntarily discontinuing antihypertensive therapy to "keep curcumin."

If, on the contrary, blood pressure has persistently increased, you shouldn't simply increase the dose of turmeric or curcumin in an attempt to lower it. You should look for common causes of poor hypertension control and evaluate treatment.

When high blood pressure requires urgent help

Turmeric or curcumin should not be used to quickly lower very high blood pressure. The supplement is not an emergency treatment and has not been proven to have a rapid, predictable blood pressure-lowering effect.

If the pressure is above 180/120 mmHg, the American Heart Association recommends repeating the measurement after one minute. If such high pressure is accompanied by chest pain, shortness of breath, weakness or numbness, slurred speech, vision changes, or other new worrisome symptoms, it may indicate a hypertensive emergency and requires immediate medical attention. [30]

If your blood pressure remains above 180/120 mmHg but you don't have any symptoms, you should still contact your healthcare professional promptly for evaluation and treatment adjustments. Don't wait for turmeric, tea, or other supplements to lower your blood pressure. [31]

Is curcumin safe for everyone with hypertension?

A diagnosis of hypertension alone does not mean that turmeric should be avoided. Safety concerns are more relevant to concentrated supplements, especially those containing highly bioavailable forms of curcumin or additional components.

The US National Center for Complementary and Integrative Health notes that conventional oral forms of turmeric and curcumin in recommended amounts are likely safe for short-term use, but may cause nausea, reflux, upset stomach, diarrhea, or constipation. Cases of liver injury have been reported for some highly bioavailable preparations. [32]

Therefore, having hypertension in itself does not make curcumin “prohibited”, but a combination of several medications, liver disease, or the use of a highly concentrated preparation are reasons to treat the supplement as a biologically active agent, and not as a common spice. [33]

What is often misunderstood

"Turmeric quickly lowers high blood pressure." No. Even positive studies evaluate regular use over weeks, and the average reduction is usually only a few millimeters of mercury. Curcumin is not intended to quickly cure high blood pressure. [34]

"Turmeric increases blood pressure, so it is contraindicated for people with hypertension." Clinical studies do not support this. The overall results are either neutral or show a slight reduction in blood pressure. [35]

"If curcumin lowered blood pressure in a study, can the tablet dosage be reduced?" No. The effect of the supplement is not predictable enough, and current hypertension guidelines do not use curcumin as a replacement for proven drug therapy. [36]

"The more curcumin, the more the blood pressure drops." Such a consistent relationship was not established. In a 2023 dose-response analysis, neither dose nor duration of use were significantly associated with a proportional reduction in either blood pressure measure. [37]

Key points from experts

John William McEvoy is Professor of Cardiology at the University of Galway and Co-Chair of the European Society of Cardiology's 2024 Guidelines Task Force on High Blood Pressure and Hypertension. The Task Force's recommendations emphasize physical activity, sodium reduction, a healthy diet, normal body weight, alcohol limitation, and smoking cessation as the cornerstones of non-drug blood pressure control; evidence-based antihypertensive therapy is added when indicated. Curcumin is not included in the standard treatment strategy for hypertension. [38]

Rhian Tooze is a professor of cardiology at McGill University, an expert in hypertension and vascular biology, and co-chair of the same European Society of Cardiology working group. Her expertise specifically covers the mechanisms of hypertension and vascular function. The current guidelines developed by the group she co-chairs emphasize the need to assess overall cardiovascular risk and use interventions with proven effects on blood pressure and cardiovascular outcomes, rather than replacing them with dietary supplements with a less definitive evidence base. [39]

Frequently Asked Questions

Does turmeric lower or raise blood pressure?

If there is an effect, it is likely to be directed at a small reduction in blood pressure. Some meta-analyses find a reduction of approximately 1-3 mmHg, while others find no significant overall effect. [40]

Can you use turmeric if you have hypertension?

Regular dietary consumption of turmeric is not considered a contraindication for hypertension. However, using the spice as a treatment for high blood pressure is not recommended.

Can curcumin replace blood pressure pills?

No. Its effect is much less predictable and less well proven than that of standard antihypertensive therapy. [41]

Can curcumin significantly lower blood pressure?

This effect is not considered typical. In meta-analyses, the average reduction is small. However, in patients with initially low blood pressure or taking several antihypertensive drugs, attention should be paid to weakness, dizziness, and presyncope. [42]

Can curcumin be taken with hypertension medications?

While compatibility is sometimes possible, it cannot be guaranteed universally. Clinical interaction data are limited, and some formulations contain piperine, which can affect drug metabolism. [43]

Should curcumin and blood pressure pills be spaced apart?

There is no fixed, proven interval. If the interaction occurs through metabolic enzymes or transport systems, several hours between doses does not guarantee its elimination. [44]

Does curcumin help blood pressure in people with diabetes?

In a 2026 meta-analysis, people with prediabetes or type 2 diabetes had an average reduction in systolic pressure of about 2.7 mmHg, but no overall significant effect on diastolic pressure.[45]

How long does it take for turmeric to start lowering blood pressure?

There is no reliable time frame. Positive results were more often obtained with a course of treatment over several weeks, rather than after a single dose. Curcumin should not be used for emergency blood pressure reduction. [46]

Which is better for blood pressure - turmeric or curcumin?

No convincing hypotensive effect has been established for dietary turmeric in typical culinary quantities. Most clinical data pertain to concentrated supplements and extracts.

What should I do if I feel dizzy after taking curcumin?

Measure your blood pressure, repeat the measurement after resting, and assess whether it has become unusually low. If symptoms occur after starting the supplement, especially when taken concurrently with antihypertensive medications, further use should be discussed with a healthcare professional.

Main

Turmeric is not considered a blood pressure-lowering food. A body of research suggests that curcumin may have a slight hypotensive effect, but the magnitude of this effect is small and inconsistent.

The largest analyses have shown varying results, ranging from virtually no effect to an average reduction of about 2 mmHg. New data from 2026 suggest a somewhat larger reduction in systolic pressure in people with prediabetes, diabetes, and baseline high blood pressure, but even there the effect is only a few millimeters of mercury. [47]

Therefore, turmeric can be considered a food product, and curcumin a supplement with a possible small effect on vascular function, but not as a treatment for hypertension. Lifestyle changes and, if necessary, drug therapy are much better supported for blood pressure control. [48]