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These studies suggest that herbs such as garlic, hibiscus, resveratrol, cherry juice, beetroot juice, bergamot extracts, barberry, pycnogenol, garden cress, fenugreek, black seed, grape seed, saffron, green and white mulberry, quince, licorice, bay leaves, and rosella flowers can effectively lower blood pressure.
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Hypertension, or high blood pressure, is a significant risk factor for cardiovascular diseases, affecting millions globally. While conventional medications are effective, many individuals seek herbal alternatives due to concerns about side effects. This article synthesizes research findings on the most effective herbs for lowering blood pressure.
Hibiscus sabdariffa, commonly known as hibiscus tea, has been extensively studied for its antihypertensive properties. Clinical trials have demonstrated that daily consumption of hibiscus tea significantly lowers systolic blood pressure (SBP) and diastolic blood pressure (DBP) in prehypertensive and mildly hypertensive adults . One study showed a reduction in SBP by 7.2 mm Hg compared to a placebo. Another trial confirmed that hibiscus tea effectively manages stage one hypertension, with significant reductions in both SBP and DBP.
Garlic is well-known for its cardiovascular protective properties. Meta-analyses have shown that garlic supplements can reduce SBP by an average of 5.1 mm Hg and DBP by 2.5 mm Hg in hypertensive individuals. The antihypertensive effect is more pronounced in those with higher baseline blood pressure, making garlic a valuable complementary treatment for hypertension.
A study investigating the effects of mixed herbs and spices at various dosages found that a high culinary dosage (6.6 g/day) significantly lowered 24-hour ambulatory blood pressure in adults at risk of cardiometabolic diseases. This suggests that incorporating a variety of herbs and spices into the diet can have a beneficial effect on blood pressure management.
Bay leaves (Syzygium polyanthum) and rosella flowers (Hibiscus sabdariffa) have been traditionally used to manage hypertension. Research indicates that both herbs effectively reduce blood pressure, with rosella flowers showing a slightly higher efficacy in lowering SBP and DBP. These findings support the use of these herbs as alternative therapies for maintaining blood pressure.
Garden cress, fenugreek, and black seed have shown potential in managing hypertension, especially when combined with conventional antihypertensive drugs like metoprolol. Studies in hypertensive rats demonstrated that these herbs, when used alongside metoprolol, significantly enhanced the reduction in both SBP and DBP compared to the use of herbs or the drug alone. This highlights the potential for synergistic effects between herbal and conventional treatments.
Herbal supplements such as hibiscus tea, garlic, mixed herbs and spices, bay leaves, rosella flowers, garden cress, fenugreek, and black seed have shown promising results in lowering blood pressure. These herbs can be effective components of dietary changes recommended for individuals with hypertension. However, it is essential to consider appropriate dosages and potential interactions with conventional medications. Further research is needed to standardize these herbal treatments and confirm their long-term efficacy and safety.
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