Rooibos (Aspalathus linearis) is a plant that grows in South Africa, its leaves are used to make a herbal tea.
There are two varieties of Rooibos: Green Rooibos - unfermented tea; Red Rooibos - fermented tea.
Rooibos tea contains no caffeine and has a relatively low level of tannins compared to traditional black or green tea.
As a fresh leaf, rooibos contains a high content of ascorbic acid (vitamin C), which is lost when made into tea.
Red rooibos tea is fully oxidized giving it a unique polyphenol profile consisting of aspalathin, rutin, orientin, as well as many other flavonoids such as flavanols, flavones, and flavanones, and chemicals such as dihydrochalcones, and nothofagin.
Studies have shown its composition in polyphenols (dihidrochalcones: aspalathin, nothofagin; free flavones and glycosides: orientin, iso-orientin, vitexin, isovitexin, luteolin, luteolin-7-O-β-D-glucoside; free flavonols and glycosides: quercetin, hyperoside, rutin; tannins).[1:1]
Green rooibos tea is unfermented giving it a different polyphenol profile compared to red rooibos; consisting of varying concentrations of specific flavonoids, luteolin, and orientin, which are naturally found in Red Rooibos tea.[2:1]
The processed leaves and stems contain benzoic and cinnamic acids.
Red Rooibos has moderate Antioxidant Activity[1:2]
Treatment with Green Rooibos Tea Extract reversed Oxidative Stress induced by obesity from high caloric diet.
The plant is utilized in traditional medicine as a relaxing drink due to its caffeine free and low tannin composition.[1:3]
Disease / Symptom Treatment
A. linearistea became known as a healthy drink after the success in the treatment of chronic restlessness, in a colicky baby by administration of Rooibos tea infusion.[1:4]
Red Rooibos Tea Stimulates Osteoblast Mineralization in a Dose-Dependent Manner.[2:2]
Title: Chemical Analysis and Antioxidant Activity Of Some Rooibos Tea Products
Publication: Farmacia, the official journal of the Romanian Society of Pharmaceutical Sciences
Date: April 2019
Study Type: Chemical Analysis
Author(s): Alexandra Epure, Ilioara Oniga, Daniela Benedec, Daniela Hanganu, Ana-Maria Gheldiu, Anca Toiu, Laurian Vlase
Institution(s): “Iuliu Hațieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Title: Red Rooibos Tea Stimulates Osteoblast Mineralization in a Dose-Dependent Manner
Publication: MDPI: Beverages
Date: December 2019
Study Type: Human Study: In Vitro
Author(s): Michael D. McAlpine, William Gittings, Adam J. MacNeil, and Wendy E. Ward
Institution(s): Brock University, St. Catharines, Ontario, Canada
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Title: The Effects of a Green Rooibos Extract on the Reproductive Function of Obesity-Induced Insulin Resistant or Hypersensitive Male Winstar Rats
Publication: Stellenbosch University Library SUNScholar Research Repository
Date: December 2019
Study Type: Animal Study: In Vivo
Author(s): Claudine Manirafasha
Institution(s): Faculty of Medicine and Health Sciences at Stellenbosch University
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