Sanimed Renal, Liver and Stones Cat contains low phosphorus to slow the loss of kidney corpuscles. kidney failure is thus inhibited. The high content of salmon oil in Sanimed Renal, Liver and Stones also slows the decline of kidney corpuscles. Salmon oil is rich in Omega-3 vert acids that improve blood flow (and thus filtration) of the kidneys and lower blood pressure. The protein content in Sanimed Renal, Liver and Stones is low to reduce the amount of urea (breakdown product of protein) in the blood. The low sodium content keeps blood pressure from getting too high.