Reduction of blood pressure in salt-fed Dahl salt-sensitive rats with diets rich in olive oil, safflower oil or calcium biphosphate but not with calcium carbonate.

Increased dietary calcium as CaCO3 had no effect in NaCl-induced hypertension in Dahl salt-sensitive (Dahl-S) rats, while the calcium supplementation as CaHPO4 did lower the blood pressure (BP). A diet rich in either monounsaturated or polyunsaturated fatty acids produced a significant lowering of blood pressure compared with the relatively saturated palm-oil diet in NaCl-induced hypertension in Dahl-S rats. The lower BP found with olive oil is probably not related to increased amounts of PGE2 and PGI2.