This paper might have prompted the BBC article: http://www.ncbi.nlm.nih.gov/pubmed/23671105
And I think the fibre they talk of is indeed inulin:
http://www.ncbi.nlm.nih.gov/pubmed/21883787
And I think the fibre they talk of is indeed inulin:
http://www.ncbi.nlm.nih.gov/pubmed/21883787