[Bromatological study of protein concentrates from Sardinella aurita and Tilapia melanopleura. II. Analysis of minerals].

The calcium and phosphorus of fish protein concentrates (FPC) prepared from whole sardines or tilapias have high biological availability, but the mineral fraction as a whole did not support the normal growth of young rats. Fluoride absorption and utilization is low; the amount retained in the carcass of rats depends on the amount given in the diet according to the equation: Y=0,0672X + 0,202 Y=mg of fluorine retained X=ppm of fluorine in the diet In case of sub-optimal levels of mineral ingestion, fluoride fixation increased proportionally to the deficiency. Our results demonstrate that does not seem necessary to reduce the amount of fluoride in FPC intended for human consumption, at least for people without mineral deficiency in the diet. Results concerning the Ca, P and F balance in rats are presented.