There is a strong trend in this era among most of the developing countries towards economic liberalization and free market application. Egypt is a representative country as a case study that has passed several steps towards this direction. Such trend has impacts on the household welfare during the transition period of transformation, particularly on food consumption and, in turn, on the dietary adequacy of the low income people. It was found that such movements of free price food will cause a deficiency in protein quality (net protein utilized). Such deficiency will be harmful to vulnerable groups whom are going to be productive adults in the future. From the sustainable development view, it is important to secure adequate protein of good quality for those groups, till the economic growth due to liberalization reaches the level enough to make the low income households able to purchase the adequate protein of better food commodities such as milk and eggs or fish.