Hypertension

Sodium sensitivity & Genetics 

Sodium Sensitivity

Sodium sensitivity refers to how strongly blood pressure responds to changes in sodium intake. Individuals with certain genetic traits tend to retain more sodium through the kidneys, increasing blood volume and blood pressure.

Try This Today

Understanding sodium sensitivity helps personalize dietary recommendations rather than applying a one-size-fits-all approach.

Measure: Compare BP readings after high-sodium meals.

Do: Reduce processed foods for one week and observe changes.

Reflect: Ask whether sodium sensitivity may explain BP fluctuations.

For Real

Is This Your Story?

Two patients consume similar diets. One experiences significant BP increases after restaurant meals, while the other shows minimal changes. Further evaluation reveals the first patient has insulin resistance and a strong family history of hypertension, making them far more sodium sensitive.

Relevance

Groups more likely to be sodium-sensitive include: Older adults, Individuals with hypertension, People with insulin resistance, African Americans, Those with kidney disease, Individuals with a family history of hypertension

Insulin resistance further worsens sodium retention because elevated insulin signals the kidneys to conserve sodium.

Relevant labs and measurements include:

Blood pressure trends, Kidney function (Creatinine, eGFR), Fasting insulin, Electrolytes, Urine sodium (when indicated)

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