Charlene Marais from the University of the Free State in South Africa conducted extensive research on the healing benefits of rooibos in the wake of scientific proof of Theron's anti-spasmodic theory in 1974. Marais discovered and isolated compounds such as ascorbic acid, quercetin and luteolin in the tea. Ascorbic acid has antioxidant qualities, which means it eliminates free radicals, and research indicates it also supports the immune system, along with helping prevent strokes, cancer and heart attacks. Rutin, another compound found in rooibos, reinforces and stabilizes blood vessels. Several carboxylic acids isolated in the tea have the potential to inhibit damage to the liver. (Continued...)