Reduced sodium chloride intake normalises blood pressure distribution

Area of Science:

• Cardiovascular Science
• Human Physiology
• Nutritional Science

Background:

• Dietary sodium intake is a key factor influencing blood pressure regulation.
• Understanding the impact of sodium on blood pressure distribution in diverse age groups is crucial for public health.

Purpose of the Study:

• To investigate the effect of varying dietary sodium levels on blood pressure distribution in healthy normotensive subjects.
• To identify the prevalence and characteristics of 'sodium-sensitive' individuals within the study population.

Main Methods:

• 172 healthy normotensive subjects aged 3-77 years participated.
• Blood pressure was measured after two weeks on usual, high, and reduced sodium intake diets.
• Statistical analysis of blood pressure distribution and identification of sodium sensitivity.

Main Results:

• High sodium intake resulted in a right-skewed distribution of supine systolic and diastolic blood pressure.
• Reduced sodium intake normalized the blood pressure distribution.
• 22% of subjects exhibited 'sodium sensitivity,' showing a significant blood pressure fall on a reduced sodium diet.

Conclusions:

• Dietary sodium significantly impacts blood pressure distribution in healthy individuals.
• Reducing sodium intake can normalize blood pressure and benefit 'sodium-sensitive' individuals.
• Findings highlight the importance of sodium moderation for cardiovascular health across a wide age range.