## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Var**} & \multicolumn{3}{c}{**Sand**} & \multicolumn{3}{c}{**Silt**} & \multicolumn{3}{c}{**Silt**} \\  & **Min** & **Max** & **Mean** & **SD** & **Sk** & **Min** & **Max** & **Mean** & **SD** & **Sk** \\ \hline Al & 14,632 & 120,889 & 77,615 & 32,160 & \(-\)0.626 & 57,111 & 191,537 & 164,576 & 41,851 & \(-\)2.591 \\ Ba & 3.5 & 339 & 66.5 & 128 & 1.795 & 3.5 & 946 & 491 & 314 & \(-\)0.584 \\ Br & 0.4 & 21.3 & 7.5 & 8.7 & 0.534 & 0.4 & 35.5 & 16.5 & 13.1 & 0.189 \\ Ca & 2145 & 3032 & 2414 & 269 & 1.64 & 1979 & 2795 & 2235 & 249 & 1.469 \\ Cr & 48.4 & 139.5 & 110.0 & 28.6 & \(-\)1.304 & 172 & 269 & 230 & 29.2 & \(-\)0.756 \\ Cu & 1.5 & 87.0 & 33.2 & 31.8 & 1.17 & 26.6 & 96.9 & 44.7 & 21.1 & 2.245 \\ Fe & 1541 & 12,717 & 7877 & 3085 & \(-\)0.725 & 10,333 & 33,040 & 27,633 & 6800 & \(-\)2.497 \\ K & 9701 & 16,517 & 12,436 & 2278 & 0.499 & 10,321 & 31,934 & 15,122 & 6544 & 2.591 \\ Mg & 766 & 2429 & 1744 & 460 & \(-\)0.974 & 1228 & 3782 & 2837 & 876 & \(-\)0.833 \\ Mn & 3.0 & 164.1 & 86.8 & 51.8 & \(-\)0.357 & 114 & 410 & 186 & 103 & 1.654 \\ Na & 100 & 7116.9 & 3675 & 2912 & \(-\)0.302 & 100 & 5263 & 3238 & 1553 & \(-\)1.089 \\ Ni & 1.0 & 46.1 & 31.2 & 14.0 & \(-\)1.279 & 41.3 & 92.3 & 69.1 & 18.5 & \(-\)0.243 \\ P & 1907 & 3969 & 2503 & 630 & 1.704 & 1409 & 1912 & 1583 & 141 & 1.645 \\ Pb & 1.0 & 42.1 & 9.6 & 17.1 & 1.641 & 30.8 & 53.5 & 45.4 & 7.7 & \(-\)0.675 \\ S & 100 & 343 & 221 & 85.0 & \(-\)0.161 & 170 & 1887 & 395 & 561 & 2.977 \\ Si & 227,241 & 526,562 & 456,435 & 94,067 & \(-\)2.201 & 281,203 & 439,925 & 318,063 & 48,084 & 2.468 \\ Sr & 14.2 & 32.8 & 22.6 & 6.5 & 0.796 & 32.8 & 75.3 & 47.4 & 12.8 & 1.425 \\ Ti & 1920 & 7711 & 4091 & 1926 & 1.199 & 5845 & 8050 & 6642 & 634 & 1.336 \\ V & 1.5 & 104 & 37.2 & 38.3 & 0.556 & 50.2 & 255 & 195 & 59.1 & \(-\)2.12 \\ Zn & 9.1 & 23.3 & 15.9 & 4.5 & 0.149 & 27.9 & 66.0 & 53.2 & 12.3 & \(-\)1.215 \\ Zr & 101 & 440 & 209 & 121 & 1.108 & 176 & 531 & 258 & 108 & 2.477 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Statistical chemical composition summary of studied samples sand and silt fractions. that moderate consumption of Fe-rich geophagic materials is indicated as a supplement. In this study, geophagic materials showed higher contents than RDD (30-60 mg/kg) [73] for women and adolescents. Studies showed similar results [2], suggesting that Fe toxicity depends on bioavailability, which can be reduced in geophagic materials [13]. For protein synthesis, muscle and nerve functions, blood glucose control, and the regulation of blood pressure, Mg is essential, and toxicity is linked to nausea and abdominal pain [77], with an RDD of 360 mg/kg in adults [78]. Studied samples presented mean = 1744 mg/kg in sand, and 2837 mg/kg in silty fractions. Zinc is described as beneficial in several physiological activities, including synthesis and degradation of carbohydrates, proteins, lipids, and nucleic acids, as well as testicular maturation and wound healing [52]. Excessive and prolonged Zn intake can cause anemia and affect the immune system [79]. In this study, Zn content in total consumed fraction was within RDD (40 mg/kg) [80]. Sulphur (S) is the seventh most abundant and essential element in the human body [81]. Copper is a component in enzymes involved in Fe transport, as well as glucose and cholesterol metabolism. Chronic Cu consumption may result in gastrointestinal irritation, diarrhea, and liver failure, with an RDD of 10 mg/kg [74,81]. In this study, mean concentrations were 33.2 and 44.7 mg/kg, in sand and silt fractions, respectively, with 1.5 mg/kg in market samples MZW and MXR. Another essential trace element for the organism is Mn [82], with a defined RDD of 3 mg/kg. Toxicity is linked to memory problems, hallucinations, and Parkinson's disease [83]. Studied samples showed means of 86.8 (sand) and 186 (silt), representing a potential risk. In bone formation, Si represents a role.