Experts say the WHO's decision risks "pathologising" a behaviour that is harmless for most people.
By 2035 about 234,000 over-75s will get cancer each year - up from 130,000 now, a report estimates.
Shirley Kordie's brother Joseph is a "perfect" stem cell match and is ready to donate.
Relatives call for a criminal inquiry into the "unforgivable" actions at the Gosport hospital.
Given hours after chemotherapy, it showed promising results in children with a rare cancer.
The parents of Charlie Gard want to change the law so other cases like theirs don't end up in court.
Eight products are affected and the advice is to return bottles to where they were bought.
Charlotte Caldwell has been treating her severely epileptic son, Billy, with cannabis oil since 2016.
Genes are significant in most eating behaviours but not emotional under- or overeating, say experts.
Families of epileptic children welcomed the move, which does not change rules on recreational use.