World-Way Biotech Inc.

Hibiscus Sabdariffa L. Tea (Tisane) Lowers Blood Pressure in Prehypertensive and Mildly Hypertensive Adults

Click:15  Time:2020-02-12 13:41:00

Observational studies show that diets high in plant foods are associated with a lower risk of chronic diseases, such as cardiovascular disease and some forms of cancer (1,2). The health benefits of plant foods appear not to be simply attributable to their macro- and/or micronutrient content alone but also to the presence of phytochemicals (3). Many polyphenols, particularly the flavonoids, possess relatively potent antioxidant, antiatherosclerotic, antiinflammatory, antimutagenic, antitumor, and antiviral activities (4). Whereas further research is necessary to elucidate and quantify the contributions of phytochemicals to health promotion and disease prevention, virtually all dietary guidelines created by regulatory agencies and healthcare organizations include recommendations for generous intakes of plant foods, including fruits, vegetables, and whole-grain cereals. Interestingly, recommendations for the consumption of plant-based beverages (except for fruit juices) such as tea (Camilla sinensis) and tisanes (herbal teas) are absent despite their being particularly rich sources of phytochemicals, especially polyphenols.

One of the most common ingredients found in commercial herbal tea blends sold in the US is Hibiscus sabdariffa. In other parts of the world, H. sabdariffa calyces, and beverages derived from them, are called hibiscus tea, bissap, roselle, red sorrel, agua de Jamaica, Lo-Shen, Sudan tea, sour tea, or karkade. In vitro studies show that H. sabdariffa has antioxidant properties (5–8) and, in animal models, extracts of this flower have demonstrated hypocholesterolemic (9–11) and antihypertensive properties (12–15). Concentrated H. sabdariffa beverages lower blood pressure (BP)7 in patients with hypertension (16) and type 2 diabetes (17) compared with black tea (C. sinensis) and have an effect similar to common hypotensive drugs (18,19). The objective of our study was to determine whether consuming hibiscus tea, in an amount readily incorporated into the diet, lowers the BP of generally healthy adults at risk of developing hypertension when compared with a placebo beverage





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