A compound found only in hops and the main product they are used in - beer - has rapidly gained interest as a micronutrient that might help prevent many types of cancer.

Zinc-deficient children living in communities where they do not receive adequate amounts of zinc from their diet should be given supplements, even if they are HIV-infected, according to researchers from the Johns Hopkins Bloomberg School of Public Health and other institutions.

Connecting with nature can improve your health and wellbeing, say researchers in this week's BMJ. The theory is known as ecotherapy: restoring health through contact with nature.