A new immunotherapy regime has shown significant improvements in treatment for head and neck cancer. Meanwhile, exercise is boosting outcomes for colon cancer patients. BBC journalist Philippa Roxby explains what’s been shown in these studies.

Aflatoxins are a toxin produced by a fungi which can be found in crops. They’re having a severe impact on harvests and health including immune suppression, growth stunting and damage to the liver. The BBC’s Sophie Ormiston reports on what’s being done to tackle the problem.

Ultra-processed foods are increasingly seen as bad for us and self-reporting our diets can be very inaccurate. But now, a new urine test has found a way to accurately show how much of these kinds of foods we consume.

Finally, can an e-tattoo placed on the forehead effectively monitor stress and concentration? And how might such a device be used?

Presenter: Claudia Hammond