Using that defination, yes. However, in the free choice in the wild they will consume until their system registers the cut off point. Unfortunately the cut off point is not registered until after it has been passed as the salt in the deers system needs time to break down and the brain to make the decesion to stop the intake. By that time the animal has consumed substantially more salt than they need. Salt blocks will limit the intake more than granulated because of the effort to lick, desolve the salt in the ingestion process. Deer do need potassium and sodium especially during the green up period, about 12 - 18 % max. This rate is reduced into the post green period to the pre-green up period when the salt/sodium/potassium intake is re increased by the needs for these elements.