Food science is providing new and exciting insights into how intricately and elegantly linked our good health is to our food choices. This does not only apply to cancer prevention and cardiovascular health but to our mental health as well. There is now evidence that black tea does indeed play a role in helping people recover from everyday stresses. The University College London study is in the journal Psychopharmacology.

• Andrew Steptoe, British Heart Foundation Professor of Psychology and Deputy Head of the Department of Epidemiology and Public Health at University College London.