What dietary change would most benefit a patient with high cholesterol levels?

Increasing fiber intake is highly beneficial for a patient with high cholesterol levels because soluble fiber can help reduce circulating cholesterol levels in the bloodstream. Soluble fiber binds to cholesterol in the digestive system, allowing it to be excreted rather than absorbed into the body. This process can lead to lower low-density lipoprotein (LDL) cholesterol, commonly referred to as "bad" cholesterol. Foods high in soluble fiber include oats, beans, lentils, fruits like apples and citrus, and vegetables.

In contrast, increased water intake does not have a direct impact on cholesterol levels, although staying hydrated is important for overall health. Higher protein intake does not specifically target cholesterol reduction and may depend on the source of the protein—animal sources can be high in saturated fats, which may contribute to higher cholesterol levels if consumed excessively. Increased sugar intake would have the opposite effect, as high sugar consumption is linked to obesity and can negatively affect lipid profiles, increasing triglycerides and potentially worsening cholesterol levels. Thus, increasing fiber intake is the most effective dietary change to benefit a patient with high cholesterol levels.