Dietary sodium — encourage people to keep their dietary sodium intake low, by reducing or substituting sodium salt, as this can reduce blood pressure. Be aware that salt substitutes containing potassium chloride should not be used by older people, people with diabetes, pregnant women, people with kidney disease, and people taking some antihypertensive drugs (such as angiotensin-converting enzyme inhibitors and angiotensin-II receptor blockers). Encourage salt reduction in these groups of people.