The science behind Rooibos

Research results from all over the world confirm the health benefits of Rooibos – including its immune-modulating function and anti-obesity and anti-cancer benefits.

Research on Rooibos and immune regulation
Rooibos tea was found to affect the concentration of biomarkers for inflammation and immunity in whole blood cultures. These findings suggest that Rooibos is able to modulate immune function in vitro. Further in vivo studies could shed more light on whether Rooibos could be used as a dietary supplement to suppress or enhance immunity as needed.

Hendricks, R. & Pool, E.J. 2010. The in vitro effects of Rooibos and black tea on immune pathways. Journal of Immunoassay & Immunochemistry, 31(2), pp. 169-180.

Research on the anti-obesity effects of Rooibos
This study suggests that daily consumption of Rooibos could aid the management of metabolic diseases and obesity. In mice that had high blood lipid levels, especially those that had consumed an unhealthy diet, Rooibos was found to lower serum cholesterol, triglyceride, and free fatty acid concentrations. The tea also prevented the abnormal retention of lipids within liver cells, and it reduced the size and number of fat cells.

Beltrán-Debón et al. 2011. Continuous administration of polyphenols from aqueous Rooibos (Aspalathus linearis) extract ameliorates dietary-induced metabolic disturbances in hyperlipidemic mice. Phytomedicine, 18(5), pp. 414-424.

Research on the anti-cancer properties of Rooibos
Rooibos extracts were found to reduce the number and size of chemically-induced oesophageal tumours in rats. In fact, unfermented extracts reduced the average total papilloma size by 87%. The polyphenols present in the tea leaves are thought to be responsible for this anti-cancer effect.

Sissing et al. 2011. Modulating effects of Rooibos and Honeybush herbal teas on the development of oesophageal papilloma in rats. Nutrition and Cancer, 63(4), pp. 600-610.