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Silicon Dioxide, silicic acid and the calcium, magnesium and aluminium salts occur ubiquitously in the environment and some have been used for many years medically. Food contains various amounts of SiO2, for example: potatoes 10.1,milk 2.1, drinking-water 7.1, mineral-water 22.5, beer 131 gamma Silicon Dioxide per g or cm3. Very small amounts of silica are normally present in all body tissues but there is no evidence that they play any physiological role.

Silicic acid is a normal constituent of the urine, where it is found as early as a few days after birth. The amount excreted in the urine, which varies considerably according to the diet, is in the order of 10 to 30 mg per day (Thomas, 1965). The Silicon Dioxide content of  human tissue varies from 10 to 200 mg/100 g dry weight (spleen 15 mg,  lung 140 mg).  The normal level of silicic acid in human blood is below 1 μg SiO2/cm3; the concentration in the corpuscles is practically the same as that in the plasma. Silicic acid is present in plasma in a molybdate reactive form and is not bound to protein or any other substance of high molecular weight. Ingested monomeric silicic acid rapidly penetrates the intestinal wall and becomes distributed throughout the whole extra-cellular fluid. It enters the blood corpuscles at a slower rate.

Silicon Dioxide as a food additive, mainly used to prevent caking powdery product. Added amount shall not exceed 2% of the total weight of the food, and relatively uniform particle size is very small (micron). Nanoscale silicon dioxide will be absorbed by the body. Silica plays anti-caking in Coffee, increasing the role of liquidity. If you do not join silica, coffee mate flowability will be poor, and easy to agglomerate. Silica particle size, the value of water, oil absorption values play a major role.



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