**Question:** In a 13-15 year old female child, what is the Recommended daily Protein Intake?

**Core Concept:** Protein is an essential nutrient required for growth, tissue repair, and immune system function in children. The Recommended Dietary Allowance (RDA) is a standard for daily nutrient intake to maintain health.

**Why the Correct Answer is Right:** Adequate protein intake is crucial for children, especially girls, as they undergo significant growth and development during puberty. The correct answer, **D** (0.8 g/kg), represents the recommended daily protein intake for a 13-15 year old female child based on their body weight. The formula for calculating protein intake is as follows:

0.8 g/kg = Daily Protein Intake (g) = (Body Weight (kg) x 0.8)

**Why Each Wrong Option is Incorrect:**

A. **0.5 g/kg**: This value is too low and may result in slower growth, inadequate tissue repair, and compromised immune function.

B. **1.2 g/kg**: This value is higher than the recommended intake and may lead to increased fat storage, negatively affecting body composition and overall health.

C. **0.9 g/kg**: This value is similar to the correct answer (0.8 g/kg) and does not provide a significant difference in protein intake for a 13-15 year old female child.

**Why Protein Intake is Important in Female Children:**

Protein intake is crucial for girls during puberty as growth spurts, menarche, and increased lean body mass occur. Insufficient protein can lead to impaired growth, delayed puberty, and weakened immune function, while excessive intake can cause weight gain, obesity, and negatively impact body composition.

**Clinical Pearl:** Adequate protein intake during adolescence can help achieve optimal growth, development, and overall health in girls. Monitoring and ensuring proper protein consumption is essential for pediatricians, nutritionists, and families.

**Example:** A 30 kg girl would require approximately (30 kg x 0.8 g/kg) = 24 g/day of protein to maintain growth and development during puberty.

**Correct Answer Explanation:** The correct answer of **0.8 g/kg** is derived from the formula: Daily Protein Intake (g) = (Body Weight (kg) x 0.8). This value ensures adequate protein intake for a 13-15 year old female child, supporting growth, development, and overall health during this critical period.

**Why the Other Options are Incorrect:**

- **0.5 g/kg**: This value is too low and may lead to slower growth, inadequate tissue repair, and compromised immune function.
- **1.2 g/kg**: While slightly higher than the correct answer, this value may result in increased fat storage and negatively impact body composition.

**Understanding Protein Requirements:**

Protein intake in children is essential for growth, development, and overall health. Adequate protein consumption ensures that girls achieve optimal