What does your result mean?

This is your estimated 24-hour urinary sodium excretion.

If you are:

1. In range: For most adults aiming for moderate sodium intake, ~65–100 mmol/day (≈1.5–2.3 g sodium/day; ~3.8–5.8 g salt/day) aligns with common dietary targets. Keep your current approach: favor minimally processed foods, taste before salting, and watch packaged-food labels.
2. Below range: You’re below typical targets. This can reflect low sodium intake, heavy sweating with limited replacement, or effects of certain medications. If you feel light-headed, crampy, or unusually fatigued, consider modestly adding salt with meals and timing sodium around exercise and hot days.
3. Above range: You’re above typical targets. This usually reflects higher sodium intake. Reduce added salt at the table, choose lower-sodium packaged options, prioritize fresh foods, and use flavor from herbs, acids (lemon/vinegar), and spices. Small reductions add up across the week.

Note: Targets are guides, not medical advice. Adjust if you have high or low blood pressure, kidney or heart conditions, are pregnant, or notice symptoms like swelling, dizziness, cramps, or excessive thirst.

How is this calculated?

Evidence baseline:

We multiply your 24-hour urine sodium concentration (mmol/L) by your 24-hour urine volume (L/day) to estimate daily sodium excretion (mmol/day). In steady state, urinary sodium captures most dietary sodium. Conversions: 1 mmol Na = 23 mg sodium; 1 mmol ≈ 58.5 mg salt (NaCl).

Sized to you:

The estimate uses your own urine sodium and total 24-hour volume, not population averages. For context, the number can be expressed as mg sodium/day and g salt/day.

Activity adjustment:

Exercise and heat move sodium loss from urine to sweat. Heavy sweating or long sessions may lower urinary sodium for the same intake; low activity or cool conditions may raise it.

Environment & day-to-day:

Hot/humid weather, high altitude, illness (e.g., vomiting/diarrhea), hydration level, menstrual phase, and medications (e.g., diuretics or mineralocorticoid blockers) change sodium handling. Incomplete 24-hour collections or unusually high fluid intake can skew results.

Why a range?

Intake and losses fluctuate with meals, sweat, fluids, and day-to-day physiology. A range reflects normal variability and individual sensitivity better than a single “perfect” number.

Backed by leading scientific literature

Based on established scientific principles.

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