Abstract
Research has been conducted on processing tuna bones into flour which has a high mineral content which aims to produce nutritious biscuits in the form of food products. This study obtained the results that the tuna bone water content was 6.40% and the biscuit water content was 2.67%, the calcium and phosphorus content of tuna fish was 5.35% and 3.37%, while the biscuit dough with variations in the ratio between flour and fish bones namely 100 : 0; 95 : 5; 90 : 10; and 85 : 15 obtained the results of increased calcium content of 0.9%; 0.97%; 1.25%; and 1.29%; and phosphorus content 0.38%; 0.43%; 0.46%; and 0.60%; and the protein content is 9.32%; 11.74%; 11.99%; and 12.4
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