A perfluoroctanoic acid or a salt or an ester thereof, perfluorosuberic
acid, perfluoroheptanoic acid, perfluorohexanoic acid, perfluoropentanoic
acid, perfluorobutanoic acid or perfluoropropionic acid or a salt or an
ester any thereof, or perfluoroctane are useful in treating diabetes,
obesity, hypercholesterolaemia, hyperlipidaemia, cancer, inflammation or
other conditions in which modulation of lipid or eicosanoid status or
function may be desirable.