What is the recommended increment in protein intake during lactation, based on a milk protein concentration o… - NHM UP Staff Nurse-2023 Shift-2nd

NHM UP Staff Nurse-2023 Shift-2nd

Applied Nutrition & Dietetics

Hard

Appeared in: NHM UP Staff Nurse-2023 Shift-2nd

Explanation

The recommended protein increment during lactation accounts for both the amount of protein secreted in milk and the metabolic cost of its production.
On average, a mother produces about 800 mL of milk per day with a protein concentration of 11 g/L, resulting in a daily secretion of approximately 8.8 grams of protein.
The body's efficiency in converting dietary protein to milk protein is about 70%.
Therefore, the required additional dietary intake is calculated as (8.8 g / 0.70), which equals approximately 12.6 g.
To ensure a safe margin for individual variations, this is rounded up to the standard recommendation of 15 g/day.

Option A: This value is higher than the calculated requirement. An increment of 20-25 g/day is sometimes recommended based on different efficiency factors (e.g., in certain Indian dietary contexts) or for mothers with higher milk output, but 15 g/day is the more standard baseline increment.
Option B: This amount is insufficient. It is less than the actual amount of protein secreted daily in breast milk (approx. 8.8 g), without even accounting for the body's conversion inefficiency.
Option D: This amount is close to the net amount of protein secreted in milk (8.8 g) but fails to account for the 70% conversion efficiency. The mother needs to consume more than what is secreted to cover the metabolic process.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Nutritional requirements during lactation, specifically protein as background academic context rather than a clinical decision trigger.
Adequate protein intake during lactation is crucial for synthesizing nutrient-rich milk for the infant's growth and for preventing the depletion of the mother's own muscle and tissue stores.
Nurses should assess the dietary intake of lactating mothers and provide education on increasing consumption of high-quality protein sources like dairy, lean meats, fish, eggs, legumes, and nuts.
What if? If a mother is lactating with twins, her milk production can be significantly higher (e.g., 1.5 L/day or more). In this case, her protein and calorie needs would increase proportionally, and the recommended increment would be much higher than 15 g/day, likely closer to 25-30 g/day.

How to Approach the Question

First, identify the key components of the question: 'increment in protein intake', 'lactation', and the specific value '11 g/litre'.
Recall the physiological basis for increased nutritional needs during lactation: the body must produce milk.
Remember the formula for calculating additional protein: (Daily milk volume × Protein concentration) / Conversion efficiency.
Plug in the standard values: approximately 0.8 L for volume, 11 g/L for concentration, and 0.70 for efficiency.
Calculate the required intake: (0.8 * 11) / 0.70 ≈ 12.6 g.
Compare this calculated value to the given options and select the one that represents this requirement plus a reasonable safety margin.

Concept Tested & Keywords

Concept Tested: Nutritional requirements during lactation, specifically protein.
Stem keywords: protein intake, lactation, increment, milk protein concentration
Lead-in keywords: What is

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