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Rooibos is completely caffeine free and, unlike black tea (Camellia sinensis), does not contain tannins that may interfere with iron absorption. Rooibos is rich in flavonoids, polyphenols, and phenolic acids (including aspalathin, (+)-catechin, isoquercitrin, luteolin, quercetin, rutin, caffeic acid, ferulic acid, and vanillic acid). The polyphenol aspalathin is unique to rooibos. The plant also contains oligosaccharides, polysaccharides, and a variety of minerals, though at levels that are of questionable clinical relevance.15
Preliminary studies show that rooibos has antimutagenic and antioxidant properties.16, 17, 18, 19 It has also shown some ability to prevent radiation damage in animals.20, 21, 22 This research somewhat supports rooibos’s traditional use to slow the aging process, and its modern use as a cancer preventative. Laboratory and animal studies indicate that it affects antibody production and has anti-HIV activity.23, 24, 25 These studies raise the possibility that the herb could be useful in aiding deficient immune responses in allergies, AIDS, and infections. No clinical trials have yet been published on this herb, however, so its efficacy is still unknown.
A tea can be made by steeping 1 to 4 teaspoons (5 to 20 grams) of rooibos in 1 cup (240 ml) of water for up to ten minutes. Three cups of this tea per day may be drunk, with or without food.26
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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2016.