Final answer:
A nurse would look for reduced cholesterol levels and increased serum potassium levels in the laboratory findings of a client on the DASH diet, as these changes reflect improved blood pressure and cardiovascular health, which are goals of the diet.
Step-by-step explanation:
A nurse reviewing the laboratory findings of a client who recently began a Dietary Approaches to Stop Hypertension (DASH) diet would look for indicators that reflect the goals of the DASH diet, which include lowered blood pressure and improved cardiovascular health. Laboratory findings that indicate the client has reached one of the goals of the DASH diet might show reduced cholesterol levels, particularly in terms of lower LDL ('bad' cholesterol) and higher HDL ('good' cholesterol). Levels of electrolytes such as potassium might also be of interest given its role in managing blood pressure; higher serum potassium could suggest adherence to the diet, which recommends increasing intake of fruits, vegetables, and low-fat dairy products rich in this mineral. Additionally, a reduction in sodium levels might also be expected, as the DASH diet emphasizes lower sodium intake.