Why a Ratio Can Matter More Than Either Number Alone
Most nutrition tracking is single-target: hit your protein number, stay under your saturated fat limit, reach your vitamin C target. That works well for nutrients your body uses in isolation. But some pairs of nutrients are biologically linked — they compete for the same absorption pathway, work in opposing directions on the same system, or one directly regulates how the body handles the other.
When that's true, a person can hit the individual target for both nutrients and still be in a genuinely worse position than someone who's "under target" on both — because it's the relationship between the two numbers, not either number on its own, that predicts the outcome.
Sodium and potassium is the clearest example, and the best-evidenced. Both influence blood pressure independently. But a landmark analysis of over 12,000 adults found that the ratio between the two was a stronger predictor of cardiovascular death than either sodium or potassium intake alone — people in the highest quartile of sodium-to-potassium ratio had roughly double the cardiovascular mortality risk of those in the lowest quartile, a stronger association than either mineral showed by itself.
The core idea: it's not "salt is bad" or "potassium is good" in isolation — it's that your kidneys, blood vessels and cells manage sodium and potassium as a pair, using potassium to help flush out excess sodium and relax blood vessel walls. Push one without the other and the mechanism doesn't work the way it's meant to.
Nutriofia's Six Ratios — and How Honest We're Being About Each
We built a dedicated Nutrient Ratios tool that calculates your own 7-day average for six nutrient pairs, using your actual food log. Each one is shown on a dead-band slider — a green "in range" zone in the middle, amber shoulders either side, red at both extremes — because nobody's ratio needs to sit on one exact number, and going too far in either direction can be the problem.
Not every ratio below has the same weight of evidence behind it, and we think that matters enough to say plainly on every card. Two are backed by strong, specific outcome data. The rest are established, scientifically reasonable targets where either the underlying data coverage is thinner or the evidence points to a general risk rather than a precise cutoff. We'd rather tell you that than present all six as equally proven.
The best-evidenced ratio on the page. WHO's own intake targets work out to roughly 0.6:1 by weight. Too much sodium relative to potassium is strongly linked to hypertension, stroke and cardiovascular death — more strongly than sodium intake alone.
Check your Sodium:Potassium ratio →Both fats are essential, but they compete for the same conversion enzymes and push inflammation in opposite directions. A ratio of roughly 1:1 to 4:1 is widely cited as the ancestral range; a typical modern diet runs 10:1 to 20:1, driven mainly by seed oils.
Check your Omega-6:3 ratio →The two minerals share absorption pathways and can crowd each other out at the extremes. Cohort studies point to roughly 1.7:1 to 2.6:1 as the range associated with lowest cardiovascular and all-cause mortality risk — and US population data shows average intake has sat above 3:1 since 2000, mainly from calcium-fortified foods and supplements taken without matching magnesium.
Check your Calcium:Magnesium ratio →The two minerals compete for the same gut absorption pathway. The evidence-based target is 8:1 to 15:1 — but real-world copper deficiency from an imbalanced ratio is almost always driven by high-dose zinc supplements, not food. Worth watching mainly if you supplement zinc.
Check your Zinc:Copper ratio →The older UK/COMA fat-quality ratio — polyunsaturated fat relative to saturated fat, target roughly 0.4:1 or higher. Only around 55–61% of foods in our database carry a full fatty-acid breakdown, so this one shows "no data" more often than the others — a gap in coverage, not a gap in the science.
Check your PUFA:SFA ratio →Polyunsaturated fats oxidise easily, and vitamin E is the body's main defence against that damage in cell membranes. The classical adequate range is 0.4–0.6mg of vitamin E per gram of PUFA eaten — the same idea behind Nutriofia's existing note that omega-3 fats need vitamin E alongside them, turned into an actual number. Same fatty-acid data-coverage caveat as PUFA:SFA above.
Check your Vitamin E:PUFA ratio →What We Deliberately Left Out
Calcium:Phosphorus is calculable from our data with near-universal coverage — but we didn't build it as a scored ratio. A cross-sectional study using NHANES data specifically tested whether dietary calcium:phosphorus predicted bone density in older adults and found that it didn't, despite the ratio being commonly cited in textbooks based on bone and breast-milk composition. Building a green/red score around a ratio the evidence doesn't actually support would overstate what we know — so we left it out rather than build it just because the data existed.
How to Read the Slider
Every ratio on Nutriofia uses the same shape: a green zone in the middle with room to move, amber shoulders either side, red at both extremes. That's deliberate — a ratio has a sweet spot, not a single perfect number, and going too far in either direction can matter, even where (as with Sodium:Potassium) the evidence for harm is much stronger on one side than the other.
Each ratio page shows your own 7-day average, which foods are pushing it each way, and food or recipe suggestions to bring it back into range — worked out from your actual food log, not a generic list.
None of this is about avoiding a mineral. Sodium, zinc, saturated fat and omega-6 all have real jobs in the body. The point of a ratio isn't "less of one, more of the other" — it's making sure the two stay in a proportion your body is built to handle.
Sources: Yang Q, et al. Sodium and potassium intake and mortality among US adults: prospective data from the Third National Health and Nutrition Examination Survey. Arch Intern Med. 2011;171(13):1183-1191. Linus Pauling Institute Micronutrient Information Center (zinc:copper). Rosanoff A, et al. Suboptimal magnesium status in the United States: are the health consequences underestimated? Nutr Rev. 2012;70(3):153-164 (calcium:magnesium).
This article explains a general nutritional concept. It is educational and does not constitute medical advice. If you manage a health condition — particularly kidney disease, hypertension, or you take blood pressure or diuretic medication — discuss significant dietary changes with your healthcare team before acting on it.