It helps good cardiovascular function. Being a blue fish, omega 3 unsaturated fatty acids (EPA and DHA) are known to protect the heart, strengthen circulation and prevent heart disease. It is also a rich source of potassium, which helps lower blood pressure. Tuna is one of the most complete sources of protein, since it contains the 10 amino acids that our pets need for good cellular development, it helps to keep the immune system healthy and to replace or gain tissue and muscle mass. Niacin or vitamin B3 is abundant in tuna, and this vitamin helps maintain stable levels of high-density lipoprotein, which helps prevent the liver from eliminating HDL from the blood, keeping HDL cholesterol at healthy levels. Another benefit of tuna is that it provides protection to the skin and strengthens the hair. It delays cognitive decline, promotes and helps in learning processes thanks to Omega 3.