What Is High Blood Pressure?
High blood pressure, or hypertension, is defined by the World Health Organisation as consistently elevated pressure in the blood vessels, typically measured at 140/90 mmHg or higher[1]. According to the NHS, high blood pressure does not usually cause any symptoms, but in some cases may cause headaches, blurred vision or chest pain, so it's best to have your blood pressure checked in order to diagnose. [2]. Over time, if left undiagnosed, it may lead to serious health issues such as heart disease, stroke, and kidney damage [3]. To delve deeper into the facts and dispel common misconceptions surrounding hypertension, read Hypertension: Facts and Myths.
As people explore herbal remedies for their natural benefits and gentle support, it is important to note that not all herbs are suitable for those with high blood pressure. Some may contain compounds that stimulate the heart, raise cortisol levels, or interact with prescribed medications. Understanding which herbs to avoid – and which may be safe or even supportive – is an important step in managing blood pressure effectively and avoiding complications.
Note: Before considering any herbal remedies, we recommend speaking to a registered herbalist first. Book a consultation at Napiers to receive personalised guidance based on your individual health profile.
What Herbs Should You Avoid With High Blood Pressure?
Let’s explore the top herbs you may want to avoid if you have high blood pressure:
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Liquorice Root (Glycyrrhiza glabra)
Liquorice is often used in traditional herbal blends and teas. However, it contains glycyrrhizin, a compound that has been associated with changes in fluid balance and electrolyte levels in the body[4]. This may have implications for blood pressure management, particularly in large amounts or prolonged use.
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Ginseng (Panax ginseng)
Often taken for its energising qualities, ginseng has been noted in some studies to support a rise in blood pressure in individuals with low blood pressure[5]. For those with existing hypertension, this suggests it may have the potential to elevate blood pressure further, particularly when taken in high doses or alongside other stimulants. However, some studies also show ginseng may lower blood pressure in the long term, so there is some individual variability and need for caution. As with any supplement, it’s important to seek personalised advice before use.
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Rosemary (Rosmarinus officinalis)
Culinary use of rosemary is widely considered safe, but in concentrated extract form, it has been noted to have stimulating properties[7]. This could be relevant for those monitoring their blood pressure or undergoing treatment for hypertension, such as ACE inhibitors.
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St. John’s Wort
Best known for its traditional use in low mood support, St. John’s Wort has the potential to interact with a number of medications, which could alter their intended effect[8].
Helpful Herbs to Support Blood Pressure Naturally
Fortunately, not all herbs are off the list. Several have been traditionally used to manage high blood pressure while offering other valuable health benefits. Below are a few standout options:
Hawthorn flowering tops (Crateagus sp.)
Hawthorn is commonly used in herbal medicine to improve circulation and lower blood pressure. For therapeutic effects, a large dose is recommended—up to 40 ml of a 1:3 tincture per week, or a strong infusion (10 oz of herb to a pint of water).
Lime flowers (Tilia europea)
Lime flowers are especially helpful in managing emotional stress – an often overlooked contributor to elevated blood pressure.
Try: Napiers Lime Flowers, which are naturally rich in vitamins and minerals that help promote relaxation, aid digestion, and potentially lowering blood pressure and cholesterol. This makes them an excellent all-rounder for holistic wellness.
Yarrow (Achillea millefolium)
Yarrow promotes better blood flow and vascular elasticity, aiding long-term cardiovascular resilience.
Nettle leaf (Urtica dioica)
Nettle helps lower blood pressure by reducing uric acid levels and acting as a mild diuretic. But it’s more than just a heart-supporting herb.
Try: Napiers Nettle Leaf Tea, which is rich in natural vitamins (A, B, and K), chlorophyll, folate, beta-carotene, and essential minerals like zinc, copper, manganese, and iron. It also provides a valuable source of plant proteins. These nutrients contribute to maintaining vibrant skin, strong nails, healthy hair, and resilient
FAQs
What are the main causes of high blood pressure?
Yes, certain herbs like liquorice, ephedra, and ginseng may increase blood pressure or interfere with medications. Always consult a qualified herbalist before beginning new supplements.
Are there other safe herbs to lower blood pressure?
Yes. Herbs such as garlic, motherwort, and linden are traditionally used to help maintain healthy blood pressure when used under professional guidance.
Can I take herbal remedies instead of medication for hypertension?
Herbal medicine can support cardiovascular health, but it should never replace prescribed treatment.
What should I do if my blood pressure is high?
If your blood pressure is high, consult your doctor for proper diagnosis and advice. In the meantime, reduce salt, eat a balanced diet, exercise regularly, manage stress, and avoid smoking.
References
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World Health Organization. Hypertension. WHO.
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Kim, J. (2012). Cardiovascular Diseases and Panax ginseng: A Review on Molecular Mechanisms and Medical Applications, J Ginseng Res, 36(1), pp. 16-26. NCBI.
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National Health Service (UK). High Blood Pressure. NHS.
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Olukoga, A. and Donaldson, D. (2000). Liquorice and its Health Implications.
Journal of the Royal Society for the Promotion of Health, 20(2), pp. 83-89. SagePub.
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Fuchs, F.D. and Whelton, P.K. (2020) High Blood Pressure and Cardiovascular Disease, Hypertension, 75(2), pp. 285-292. NCBI.
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Healthline. 6 Benefits and Uses of Rosemary Tea. Healthline.
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Peterson, B. and Nguyen, H. (2023) St. John's Wort. In: StatPearls. Treasure Island, FL: StatPearls Publishing
