The teeth were obtained from individuals representing Corded Ware and Trzciniec culture buried in the mound from Gabultów. The odontologic material under analysis is scanty, but since the mound was used as a burial site by representatives of different culture groups, it may be treated as an example of pilot model studies.The results of the present research may testify to two processes. Firstly, there can be observed a distinct chronological variability in relation to the concentrations of Sr and the Sr/Ca ratio, regarded as good indicators of the organism's nutrition. Secondly an analysis of three individuals (infans I, infans II, maturus) buried in a niche grave (KCS: feature 2), points to a radical and significant change in their eating habits. A significant increase in the Sr/Ca ratio may speak for both qualitative and quantitative changes in the proportions of the consumed food in respect of the increased amount of low-calcium products (plants) in the diet and, most probably, huge elimination of milk, milk-derived foods and maybe animal protein at the expense of products derived from plant crops.