With so many different fruits and vegetables we have seen it before: claims that this or that next type of produce is going to be the next huge ’superfood’. More recently with several different types of berries, for example, we have been told this by first scientists, then the media, and then finally by marketers. (who has not received at least one spam email heralding the merits of the acai berry?). Well at this moment a strain of sweet potato is being developed and tested as the latest superfoods, and it already has scientists saying that the vegetable may really stop people from developing cancer. Wow, that is apretty heavy claim to make about any item from any food group. The logic here is that the designer sweet potato, cultivated for its purple anti-cancer pigmentation, is also supposed to contain within it some anti-ageing and antioxidant chemicals. A new variety of purple sweet potato has been developed by agricultural experts in the US; the new variety boasts a somewhat thicker purple skin and flesh that is intended to increase the inherent cancer-fighting properties of the vegetable.. Soyoung Lim, a researcher from Kansas State University, said that it differed from purple sweet potato varieties currently found in most grocery retail outlets because both the newer potato’s flesh and skin were purple.