Astragalus is a major adaptogen plant in traditional Chinese medicine, with multiple benefits for health. But is it effective at reducing hypertension?
A small perennial native to China, Mongolia and Korea, astragalus is part of the Fabaceae family, along with broad beans, peanuts, liquorice and many other medicinal plants.
It is a key plant in traditional Chinese medicine (1). In phytotherapy, it is the root of the plant which is normally used (consumed as a tea or broth…)
Astragalus is traditionally believed to boost vital energy, to be a yang tonic and to support the circulation. It is commonly described as an adaptogen (a compound that helps improve the body’s resistance to physical, metabolic and mental stressors, etc.)
As with all adaptogen plants recommended by practitioners of traditional Asian medicine, astragalus has become the subject of increasing interest to modern medicine over several years.
A number of studies have thus been able to identify its various active ingredients (2) :
Several of astragalus’ active ingredients act together to benefit cardiovascular health: it’s thought the polysaccharides lower blood cholesterol levels (3), the astragalosides protect cardiac function and fight inflammation (4), etc. But what about its effects on hypertension ?
Hypertension is a chronic medical condition in which the blood pressure in the arteries is abnormally high, bringing an increased risk of serious health problems (heart attacks, strokes...)
A number of scientists now recognise the ability of astragalus root to reduce and stabilise blood pressure (5-6), through a range of potential mechanisms:
However, it’s important to consult a health professional to make sure that taking astragalus is suitable for your condition and that it can be combined with any potential blood pressure medication.
Astragalus root offers other health benefits too:
Astragalus supports immune health, probably as a result of its high polysaccharide content.
More specifically, studies suggest that consuming astragalus extract stimulates T lymphocyte and NK lymphocyte activity (taken orally, such as Astragalus Extract, or by injection) (7-8).
The plant may also have positive effects on the brain due to potential anti-inflammatory properties, effects on the cardiovascular system and its status as a tonic (9).
Astragalus is also the focus of research for its potential effects on telomeres, the parts of DNA involved in cellular ageing.
Indeed studies suggest that astragaloside IV and cycloastragenol activate telomerase, which is responsible for curbing telomere-shortening. Astragalus is also thought to slow down natural telomere-shortening as a result of its antioxidant properties (10).
Insofar as astragalus supports the immune system, it is considered an immuno-stimulant and is therefore contraindicated in those suffering from an auto-immune disease.
Neither is it recommended for children or women who are pregnant or breastfeeding, as there is insufficient research on potential risks for the foetus and child development.
Apart from these few contraindications, no risks are associated with astragalus based on studies conducted on this Chinese pharmacopoeia plant: the only rare side effects reported are a few cases of headache and nausea.
As a result of its wide range of benefits and generally safe use, astragalus features in many dietary supplements. It has proved very popular with consumers seeking natural remedies for a number of ailments, including hypertension.
Astragalus extract is thus available as a ‘single ingredient’ supplement (such as Astragalus Extract, in liquid form).
Some of astragalus’ compounds are also highlighted in specific supplements, usually classed as anti-ageing (such as Astragaloside IV 98%, Cycloastragenol and CycloAstragenol Maximum Strength 98%).
Last but not least, you can find astragalus extract in synergistic formulations combining various adaptogen plants (such as Adaptogenic Potion and Adaptix).
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