Human are received a different levels of radiation either natural or that man-made. In the present work, radon-222 concentration, and effective radium content were studied for different types of household foods (coffee, powder milk, tea, powder coconut, rice, cornstarch, flour, and sugar) used in Egypt by using CR-39 polymer track detector, it is found a large variations in the values of radon concentrations, and effective radium content for all the samples. Annual effective dose was determined in this study, and its maximum value was 17.70 mSv/y which was found in sugar and the lowest value of its was 4.29 mSv/y which was found in coconut tpowder. Exhalation rate of radon and transfer factor were measured, and also discussed in this study.
