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Why the Na:K ratio is more important than sodium alone for blood pressure.
For informational and educational purposes only. VitalSync is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. All content presents health data against established clinical reference ranges. Always consult a qualified healthcare professional for medical advice, diagnosis, or treatment.
Sodium-Potassium (Na:K) Ratio
VitalSync tracks both sodium and potassium intake and displays the Na:K ratio badge — a metric that research shows is more predictive of blood pressure than sodium alone.
The Science
The INTERSALT trial and subsequent meta-analyses (Perez & Chang 2014; Binia et al. 2015) found that the urinary Na:K ratio has a stronger association with blood pressure than either nutrient measured independently.
- Potassium independently lowers blood pressure in a dose-response relationship.
- The WHO recommends an Na:K ratio < 1.0 (molar) as the primary dietary target.
Reading the Badge
| Badge Colour | Na:K Ratio | Meaning |
| Green | < 1.0 | Protective — good electrolyte balance |
| Amber | 1.0–2.0 | Elevated — consider increasing potassium |
| Red | > 2.0 | Risky — high sodium relative to potassium |
How to Improve Your Ratio
- Increase potassium: bananas, sweet potatoes, spinach, avocados, beans
- Reduce sodium: avoid processed foods, cured meats, and added salt
- Track both: VitalSync logs both nutrients from your meal entries
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