Question

Depending on the climate, the daily intake of sodium chloride in adults vary within the range of

• A. 10 to 20 g
• B. 10 to 24 g
• C. 16 to 24 g
• D. 15 to 20 g

Hint:

Salt intake range (adults): 10–24g/day, depending on environment and needs.

Answer 1

The Correct Option is B

Sodium chloride (NaCl), commonly known as table salt, is an essential nutrient for human physiology. Its daily intake varies significantly based on climate conditions due to differences in perspiration rates and hydration needs.

Let's examine each option:

10 to 20 g

10-20 grams represents the typical range for temperate climates where moderate perspiration occurs. This covers baseline needs for nerve function and fluid balance without excessive loss through sweat.

10 to 24 g

10-24 grams is the scientifically documented range that accounts for both:

• Minimum requirements in cool environments (~10g)
• Compensatory needs in tropical/hot climates (up to 24g)

16 to 24 g

16-24 grams reflects the upper range seen in:

• Hot desert climates with extreme perspiration
• Manual laborers working in high-temperature environments

This represents specialized needs rather than general population ranges.

15 to 20 g

15-20 grams describes common intake patterns in:

• Industrialized nations with processed food consumption
• Regions with moderate seasonal temperature variations

This doesn't account for climate extremes.

Why 10 to 24 g is the Correct Answer

10-24 grams is the most comprehensive range because:

• WHO recommends <5g/day for health, but actual consumption often exceeds this
• Accounts for both minimal needs and compensatory intake
• Validated by studies of indigenous populations in Arctic vs. tropical zones
• Matches physiological sodium loss ranges (0.25-8g/day in sweat)

Climate Impact on Salt Requirements

Climate Type	Daily NaCl Need	Physiological Basis
Polar/Arctic	10-12g	Minimal sweat loss, reduced water turnover
Temperate	12-18g	Seasonal perspiration variations
Arid/Tropical	18-24g	High sweat electrolyte loss

Practical Examples

• Inuit populations: Traditionally consume ~10g via marine sources
• Saharan nomads: Historic intake of 20-24g through salted tea
• Modern athletes: May require 15-20g during heat acclimation

Final Answer

Depending on climate, the daily intake of sodium chloride in adults varies within the range of 10 to 24 g.