The present invention provides a sodium ion absorption inhibitor
comprising a metal salt, other than a sodium salt, of a cellulose
derivatives represented by the following formula (I) as an active
ingredient, whereby absorption of salt excessively present into a living
body is effectively inhibited and salt excessively present is excreted
outside the body positively and safely. Furthermore, the present
invention provides an agent for preventing and treating diseases caused
by excessive salt ingestion or diseases in which restriction on salt
ingestion is required, comprising the same as an active ingredient, and
foods comprising the same.
R--O--A (I)
(wherein R represents a cellulose residue and A represents a functional
group having cation-exchange ability)
