Recommended Sodium Intake for Adults with Hypertension
Adults with hypertension should limit dietary sodium intake to less than 2,300 mg per day, with an ideal target of less than 1,500 mg per day. 12
Guideline-Based Recommendations
The 2025 AHA/ACC multi-society hypertension guidelines provide a Class 1, Level of Evidence A recommendation for sodium restriction in adults with or without hypertension 12. This represents the strongest possible recommendation grade, indicating:
- Primary target: <2,300 mg/day (approximately 1 teaspoon of salt)
- Ideal target: <1,500 mg/day for optimal blood pressure control
This two-tiered approach acknowledges that while 2,300 mg/day is more achievable for most patients, moving toward 1,500 mg/day provides additional cardiovascular benefits.
Blood Pressure Reduction Expected
Sodium reduction effectively lowers blood pressure across multiple patient populations. The magnitude of benefit varies based on:
- Baseline sodium intake (greater reductions seen in those consuming >2,400 mg/day)
- Age (more pronounced effects in adults <50 years)
- Starting blood pressure level (higher baseline BP shows greater absolute reductions)
The effect is significantly amplified when combined with other lifestyle interventions, particularly weight loss and the DASH eating pattern 1.
Real-World Context and Feasibility
Recent data reveals the challenge: only 29.4% of U.S. adults with hypertension meet the 2,300 mg/day target, and merely 9.5% achieve the 1,500 mg/day ideal 3. Even more concerning, only 1.3% meet both recommended sodium AND potassium targets simultaneously 3.
Critical pitfall: Sodium intake strongly correlates with total calorie intake (correlation coefficient 0.77), meaning aggressive sodium restriction often requires broader dietary restructuring rather than simply removing the salt shaker 3.
Important Caveats
Contraindication: Dietary sodium reduction may be contraindicated in patients with severe, symptomatic orthostatic hypotension 2.
Monitoring considerations: When using potassium-based salt substitutes (which can help achieve sodium targets), monitor serum potassium in patients with:
- Chronic kidney disease
- Medications that reduce potassium excretion (ACE inhibitors, ARBs, potassium-sparing diuretics, mineralocorticoid receptor antagonists) 2
Practical Implementation Strategy
Rather than aiming for extreme restriction (<1,500 mg/day) immediately, which has questionable real-world feasibility and some debate about potential harm at very low intakes 4, a stepwise approach is most reasonable:
- Initial target: Reduce to 2,300 mg/day (this alone could prevent 11 million hypertension cases population-wide) 5
- Progressive reduction: Move toward 1,500 mg/day as tolerated
- Combine with potassium: Aim for 3,500-5,000 mg/day potassium intake, which enhances the blood pressure-lowering effect 2
Most effective strategy: Combine sodium reduction with the DASH eating pattern, as this combination produces significantly greater blood pressure reductions than either intervention alone 1. Referral to a registered dietitian/nutritionist enhances adherence and efficacy 1.
The evidence strongly supports that achieving sodium intakes of 2-3 g/day (2,000-3,000 mg/day) in hypertensive patients is both beneficial and realistic, with movement toward the lower end of this range providing incremental benefit 4.