Abstract: Following the issue of its Publication 26, ICRP has successively published itsPublication 30 to meet the great changes and improvements made in the BasicRecommendations since July of 1979. In Part 1 of Publcation 30, ICRPrecommended a new method for internal dose estimation and presented someimportant data. In this report, comparison is made among methods for estimation of internaldose for the public from dietary. They include: (1) the new method suggested byICRP; (2) the simple and convenient method using transfer factors underequilibrium conditions; (3) the methods based on the similarities of severalradionuclides to their chemical analogs. It is concluded that the first method is better than the others and should beused from now on.