A nurse is providing anticipatory guidance to a client who has phenylketonuria (PKU) and is planning a pregnancy. Which of the following information should the nurse include in the discussion?

Choice B reason: Older adults should decrease their calorie intake as their metabolic rate and physical activity tend to decline with age. Excess calories can lead to weight gain and increase the risk of chronic diseases such as diabetes, cardiovascular disease, and some cancers. Older adults should aim for a balanced diet that meets their nutritional needs without exceeding their energy requirements.

Choice A reason: Older adults should not decrease their vitamin D intake, as vitamin D is essential for bone health and immune function. Older adults are at risk of vitamin D deficiency due to reduced sun exposure, decreased skin synthesis, and impaired absorption. Vitamin D deficiency can cause osteoporosis, fractures, muscle weakness, and infections. Older adults should consume adequate amounts of vitamin D from fortified foods, supplements, or sun exposure.

Choice C reason: Older adults should not decrease their protein intake, as protein is important for maintaining muscle mass, strength, and function. Older adults are prone to sarcopenia, which is the loss of muscle mass and quality due to aging. Sarcopenia can impair mobility, balance, and independence. Older adults should consume enough protein from animal or plant sources to prevent or delay sarcopenia.

Choice D reason: Older adults should not decrease their fiber intake, as fiber is beneficial for digestive health and blood glucose control. Older adults often suffer from constipation, diverticular disease, and diabetes, which can be alleviated by increasing fiber intake. Fiber can also lower cholesterol levels and reduce the risk of heart disease and some cancers. Older adults should consume at least 25 grams of fiber per day from fruits, vegetables, whole grains, legumes, nuts, and seeds.

Choice A reason: Bran cereal is high in phosphorus, containing about 34% of the DV per cup (118 g) ( 1 ). Phosphorus is a mineral that helps build strong bones and teeth, but too much of it can cause problems for people with kidney disease. The kidneys normally filter out excess phosphorus from the blood, but when they are damaged, phosphorus can build up and cause bone loss, itching, and calcification of blood vessels and organs ( 2 ).

Choice B reason: A medium apple is low in phosphorus, containing only 3% of the DV per 182 g ( 3 ). Apples are also a good source of fiber, vitamin C, and antioxidants. They can help lower blood pressure, cholesterol, and blood sugar levels, which are beneficial for people with kidney disease ( 4 ).

Choice C reason: Scrambled eggs are moderate in phosphorus, containing about 12% of the DV per large egg (50 g) ( 5 ). Eggs are also high in protein, which can increase the workload of the kidneys and worsen kidney function. People with kidney disease should limit their protein intake to 0.8 g per kg of body weight per day, unless advised otherwise by their doctor ( 6 ).

Choice D reason: Ground turkey is high in phosphorus, containing about 16% of the DV per 3 oz (85 g) ( 7 ). Ground turkey is also high in protein, which can have the same negative effects as eggs on kidney function. People with kidney disease should choose lean meats and poultry, and eat them in moderation.