The UCL’s standing requirements are satisfied when an organization, in furtherance of a bona fide, preexisting mission, incurs costs to respond to perceived unfair competition that threatens that mission, so long as those expenditures are independent of costs incurred in UCL litigation or preparations for such litigation. When an organization has incurred such expenditures, it has “suffered injury in fact” and “lost money or property as a result of the unfair competition.” Diversion of staff (even salaried staff) time to counter unfair competition is a loss of money or property as staff time has economic value and could otherwise be put to other uses.