Drinking rooibos tea does not appear to have any negative side effects; however, there is not enough evidence to indicate rooibos tea is effective as a medicine, states WebMD. Rooibos tea is an herbal infusion that does not contain caffeine.
Rooibos tea, also known as red bush tea, is made from the branches of a small tree called Aspalathus linearis that only grows in South Africa. It has long been used as a natural remedy for a variety of conditions, including allergies, asthma, heartburn, nausea and colic. While scientific evidence of its effects on humans is lacking, some animal studies suggest rooibos may have beneficial properties, says About.com.
Pregnant or breast-feeding women should avoid rooibos tea because not enough information is available about its effects, according to WebMD.