The optimum calorie to be provided by proteins in normal adults?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2021

Applied Nutrition & Dietetics

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2021

Explanation

The recommended percentage of total daily calories from protein for a healthy adult is 10-15%.
This range ensures adequate intake of essential amino acids for bodily functions like tissue repair, enzyme production, and immune function, without overburdening the kidneys.
This guideline is based on the Recommended Dietary Allowance (RDA) of approximately 0.8 grams of protein per kilogram of body weight for most adults.
Source SRC_652 confirms that current recommendations for a healthy diet call for at least 10–14% of calories from protein.

Option A: This range is generally considered too low for most adults and may lead to protein deficiency, muscle loss, and impaired bodily functions over time.
Option C: While not excessively high, this range is typically recommended for individuals with increased protein needs, rather than the general 'normal' adult population.
Option D: This is a high-protein range, not the standard recommendation for the average healthy adult, and may place extra strain on the kidneys and hydration status long-term.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Macronutrient Distribution for Normal Adults as background academic context rather than a clinical decision trigger.
Nurses play a key role in nutritional assessment and patient education. Understanding these ranges is crucial for advising patients on healthy eating habits and identifying potential dietary imbalances.
In a clinical setting, it's important to assess for signs of protein-energy malnutrition (e.g., edema, poor wound healing, muscle wasting), especially in hospitalized or elderly patients.
What if? If the patient has chronic kidney disease (not on dialysis), the nurse would anticipate a protein-restricted diet. The percentage of calories from protein would likely be prescribed to be at the lower end of the recommended range or even below 10% to reduce the workload on the kidneys.

How to Approach the Question

Identify the core of the question: It's asking for the standard dietary recommendation for protein's contribution to total calories in a 'normal' adult.
This is a factual recall question based on established nutritional guidelines.
Recall the three main macronutrients: carbohydrates, fats, and proteins, and their general caloric contributions.
Remember the typical distribution: Carbohydrates are the primary source (around half or more), fats are next, and protein is the smallest portion for a normal diet.
Evaluate the options: 5-10% is generally too low for maintenance. 20-30% is high and associated with specific athletic or dietary goals. This leaves 10-15% and 15-20% as the most plausible. The 10-15% range is the standard baseline recommendation for the average adult.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 2 p. 502-504