Too much zinc in the diet may alter gut microbiota, increasing susceptibility to Clostridium difficile infection, especially for those using antibiotics.

By Kate Kelland LONDON (Reuters) – Scientists in Britain have found a new link between the diversity of bacteria in human poo – the human faecal microbiome – and levels of harmful types of body fat. In research that may help explain why excessive weight problems and obesity tend to run in families, the scientists said high levels of visceral fat – which is linked to risks of chronic disease – were linked to having a relatively small range of bacteria in faeces. People with a high diversity of bacteria in their faeces had lower levels of visceral fat, according to the study published on Monday in the journal Genome Biology.

BERLIN, Sept 23 (Reuters) – The world heavyweight title rematch between champion Tyson Fury and Ukrainian Vladimir Klitschko on Oct. 29 has been called off for a second time with the Briton ruled “medically unfit”. “Tyson has this week been declared medically unfit to fight,” Fury’s promoters Hennessy Sports said in a brief statement on Friday. “Medical specialists have advised that the condition is too severe to allow him to participate in the rematch and that he will require treatment before going back into the ring.” (Reporting by Karolos Grohmann; Editing by Tony Jimenez)

* Heavyweight fight called off for second time * Champion Fury’s condition is “too severe” (Adds quotes, details) BERLIN, Sept 23 (Reuters) – Next month’s world heavyweight title rematch between champion Tyson Fury and Ukrainian Vladimir Klitschko was called off on Friday for a second time with the Briton ruled “medically unfit”. The fight was due to be held on Oct. 29 in Manchester, having been originally postponed in July when Fury suffered an ankle injury. “Tyson has this week been declared medically unfit to fight,” his promoters Hennessy Sports said in a statement without elaborating.

By Kathryn Doyle (Reuters Health) – Adopting a healthier diet may lower type 2 diabetes risk over time, while a worsening diet is often accompanied by increased risk, according to a new U.S. study. “Although recent public health recommendations have increasingly focused on advocating overall diet quality improvement, evidence has been limited on whether changing overall diet in adulthood has a long-term preventative impact on diabetes prevention in general population,” said lead author Sylvia H. Ley of the Harvard T.H. Chan School of Public Health and Brigham and Women’s Hospital and Harvard Medical School in Boston. “We provide evidence that improving diet quality in adulthood is associated with type 2 diabetes prevention, while worsening diet quality is associated increased risk for diabetes,” she said by email.