Nutritional support in renal patients is necessary in their treatment. The diet must include limited amounts of high quality protein, phosphorus (P) and potassium (K). n-3PUFA maintains beneficial properties against the renal damage progression. The aim was to evaluate protein (PR), (P), (K), calcium (Ca) and n-3PUFA in processed fishes as an alimentary option to renal patients. Oil canned tuna (AA), water canned tuna (AC), tomato sauce sardine (ST), chipotle sardine (SC) and smoked salmon (SA) were analyzed. (SA) had the highest concentration of (PR), (P), and (K) and the lowest concentration of n- 3PUFA. Sardines had a double quantity of (P) and (K) compared with tunas, as well as (Ca) in a raise concentration. Tunas and sardines had elevated content of n-3PUFA (4256-5213 mg/100g); P:n-3PUFA and K: n-3PUFA were small in tunas and sardines (0.03 and 0.06). (AA) and (AC) contributed with 10.1 and 11.1 mg(P)/g(PR); (ST) (26.4) and (SC)(19.1). n-3PUFA/g(PR) content was similar for tunas and sardines (302-424). Statistical difference was detected to (P) and (K) between fishes' groups. It is