The goal of this study was to quantify the adverse (phosphorus, protein, sodium, potassium and cholesterol) and beneficial [n-3 fatty acids: eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA); vitamins D(3) and E] nutrients in 14 fish species in order to evaluate their inclusion in chronic kidney disease (CKD) diets. Using AOAC methods, we obtained the following results per 100 g of fish: 50.86-227.52 mg phosphorus, 14.7-30.6 g protein and 3.83-1667.35 mg EPA+DHA. CKD patients with protein or phosphorus restrictions should avoid broadbill swordfish, black bullhead and spotted scorpionfish. However, patients may include parrot sand bass, black bullhead, broadbill swordfish, longjaw leatherjacket, oilfish, Atlantic tripletail, spotted scorpionfish and round herring in their diets based on the (P)/(EPA+DHA) ratios of these fish. Some fish species may be included in CKD diets because of their high biological value protein content - associated with cardiovascular and renal protective nutrients (EPA+DHA) - and low P, Na, K and cholesterol content, their consumption by CKD patients should be encouraged.

SUMMARY:The content and composition of the fatty acids (FAs) and astaxanthin (AST) in the edible forms of crayfish: the whole animal of Cambarellus (C.) montezumae, and the tail meat (TM) of Procambarus (M.) bouvieri were determined by GC and HPLC. The exoskeleton (EXK) of P. (M.) bouvieri was also studied. Unsaturated FAs, and mostly oleic acid (C18:1 n-9), were predominant in both edible forms. The contents of the polyunsaturated eicosapentaenoic (C20:5 n-3, EPA), arachidonic (C20:4 n-6, ARA) and docosahexaenoic acid (C22:6 n-3, DHA), were higher in the TM of P. (M.)

It was evaluated the limiting nutrients and n‐3 polyunsaturated fatty acid content of different fish species in order to determine which could be beneficial to renal patients. 14 common consumption fish were analyzed by its protein, lipid, n‐3 fatty acids (EPA+DHA), phosphorus, cholesterol, vitamins and minerals content, using the AOAC techniques. Phosphorus content varied from 50.86 – 227.52 mg/100g and protein content in all species ranged from 14.7 to 25.5g/100g. EPA+DHA extended from 3.83 to 1667.4mg/100g. Considering the phosphorus‐protein ratio recommended for renal patients, all studied species, except Swordfish, Black bullhead and Spotted scorpionfish, could be included in their diet without risk. By its risk/benefit (phosphorus/n‐3 fatty acid) coefficient Parrot sand bass, Black bullhead, Swordfish, Longjaw leatherjacket, Oilfish, Atlantic tripletail and Round herring could be administered in the renal diet. Fish species can be incorporated in renal diet taking in count that the nutrition therapy could include those species that, because of their nutritional content and risk/benefit ratio, must accommodate the patient's requirements.