Mayonnaise and CKD: Potassium, Phosphorus and Sodium Data
Mayonnaise is one of the highest-impression condiment questions on this site — "how much potassium is in mayonnaise" gets searched constantly by people building low-potassium plates — and the data answer is cleaner than most: the potassium in mayonnaise is almost nothing, and the column that actually decides mayonnaise's rating is sodium. The mayonnaise page holds the record; this piece prices the whole jar family.
The numbers by version. Regular mayonnaise carries 20 mg potassium, 21 mg phosphorus and 635 mg sodium per 100 g — the potassium line is trivially low (2% of the 2,000 mg daily limit), but the sodium line rates high-risk. The no-cholesterol version runs 14 mg potassium, 25 mg phosphorus and 486 mg sodium — moderate, the friendliest jar on the shelf. The fat-free mayonnaise-type dressings are the trap: 788 mg sodium per 100 g with the fat removed — the "lighter" label costs more sodium in this family, not less.
The tablespoon math
Condiments live or die on serving size, and mayonnaise's is small: a tablespoon weighs about 14 g, which puts a real-world sandwich serving at roughly 90 mg sodium from regular mayo — about 4.5% of the 2,000 mg daily limit. The per-100 g high-risk rating describes the jar's density, not the sandwich's reality. The pattern that breaks CKD days is not the sandwich spread; it is the mayo-based salads and dips where the jar gets measured in scoops rather than spreads. The condiments ratings hold the whole aisle at per-100 g density.
The swap layer works from both directions. The no-cholesterol jar at 486 mg sodium cuts the spread's sodium by about a quarter without a taste penalty most sandwiches can't detect. The yogurt-based builds go further: plain Greek yoghurt carries 141 mg potassium, 135 mg phosphorus and 36 mg sodium per 100 g — friendly — and a half-yoghurt half-mayo blend in the chicken salad cuts the column load roughly in half while adding protein. The Greek yoghurt page holds that base.
The potassium answer, stated plainly
For the searchers landing on the potassium question directly: at 14-20 mg potassium per 100 g across the mayonnaise family, no version of mayonnaise meaningfully moves the potassium column — a tablespoon contributes under 3 mg, which is less than a single bite of most fruits. The phosphorus line sits similarly low at 21-25 mg per 100 g in the standard versions. Mayonnaise is a sodium-column food, full stop, and the sodium data above is the whole management story.
The home-made angle deserves a note because it flips the columns: a classic home-made mayo built on oil, egg and lemon without added salt carries almost no sodium — the jar's 635 mg is a manufacturer's choice, not an inevitability. The same logic applies to the aioli builds and the yogurt-herb dressings: made at home, seasoned with lemon and herbs, the creamy-condiment slot stays friendly. The hidden-sodium piece covers the broader pattern of manufacturer salt in the condiment aisle.
The jar decision, in order
The practical jar protocol: check the label for the sodium line per 100 g first — the spread from 486 to 788 mg across the family makes the label the decider, and the phosphate-additive scan from the label piece applies to some dressing builds too. Portion with a knife, not a scoop. Blend with yoghurt where the recipe allows. And keep the potassium worry out of it — the data says mayonnaise never was a potassium problem. The low-sodium list covers the rest of the sandwich build, and the portions your dietitian sets remain the frame.
Reading the jar like a rating sheet
The mayonnaise aisle is a compact lesson in label reading because the family's three columns diverge by version, and the front-of-jar claims do not track them. The regular jar at 635 mg sodium and the no-cholesterol jar at 486 mg sit within a quarter of each other; the fat-free mayonnaise-type dressing at 788 mg sits above both. The front labels sort by fat and cholesterol claims; the data sorts by sodium — a different ranking entirely. The habit that catches it is the same one the phosphate piece teaches: flip to the nutrition panel, read the sodium line per 100 g, and let the column decide the jar. The condiments ratings pre-sorted the aisle so the reading is done once.
The egg inside the story
Mayonnaise is an egg-and-oil emulsion, which raises the fair question of whether the egg's phosphorus follows it into the jar. The data says barely: the standard jar's phosphorus line sits at 21-25 mg per 100 g — the emulsion dilutes the yolk's load across the oil volume until the per-serving contribution is negligible. This is worth stating because the phosphorus conversation on this site is usually about additives and dairy, and mayonnaise shows up on neither list; the jar's phosphorus story is a non-story, and the potassium and phosphorus questions that bring searchers here both resolve to the sodium column. The dairy and eggs ratings hold the egg itself, where the yolk's phosphorus is very much a live column.
The salad-build traps
The jar's rating understates where mayonnaise actually meets the day: the potato salad, the chicken salad and the coleslaw builds, where the spoon replaces the knife. A home-prepared potato salad rates limit in the database at 529 mg sodium per 100 g — the mayo plus the salted seasoning plus the potatoes stacking in one bowl — while the restaurant coleslaw rates friendly at 221 mg because the dressing there is vinegar-forward. The home-build lever is the same one from the mayo swaps: the yoghurt blend, the lemon-and-vinegar dressing base, and the seasoning added after tasting. The build decides the column load more than the jar does, which is why the salads get their own pages and the jar gets this one. The low-sodium list supplies the build's friendly ingredients.
The closing note stays in the site's lane: the mineral columns here are per-100 g ratings against stage 3-4 limits, the sodium and fat targets are individual numbers from the care team, and the mayonnaise question — potassium-heavy by reputation — resolves to a sodium-management story with a friendly ending. The data says the sandwich spread was never the potassium problem; the scoop-built salads and the fat-free jars are where the column actually moves, and both have workable swaps on the shelf beside them. The CKD diet guide frames the day the sandwich fits inside.
Frequently asked questions
How much potassium is in mayonnaise?
Very little — regular mayonnaise carries 20 mg potassium and 21 mg phosphorus per 100 g, and a tablespoon serving contributes under 3 mg. Mayonnaise never meaningfully moves the potassium column; the sodium line at 635 mg per 100 g is the column that decides its rating.
Is mayonnaise bad for kidney disease?
In standard sandwich portions, no — a tablespoon of regular mayo is about 90 mg sodium against a 2,000 mg daily limit. The rating turns high-risk on the jar's density and on the scoop-sized servings in mayo-based salads and dips. The no-cholesterol jar at 486 mg sodium rates moderate and is the friendliest store version.
What is the lowest-sodium mayonnaise?
The no-cholesterol mayonnaise versions rate moderate at 486 mg sodium per 100 g in the database, versus 635 mg for the regular jar — and the fat-free mayonnaise-type dressings are the worst of the family at 788 mg. The label's sodium line per 100 g decides; the home-made salt-free version beats them all.
Is light or fat-free mayo better for CKD?
Not on the sodium column — the database rates the fat-free mayonnaise-type dressing at 788 mg sodium per 100 g, higher than the regular jar's 635 mg. In this family the lighter-fat labels often carry more salt for taste; the sodium line, not the fat claim, is the column to read.
What can I substitute for mayonnaise on a renal diet?
Plain Greek yoghurt is the data-backed swap — 141 mg potassium, 135 mg phosphorus and 36 mg sodium per 100 g, friendly — and a half-yoghurt blend in chicken or egg salads halves the sodium load while adding protein. Lemon-and-herb oil dressings cover the sandwich slot the same way the condiments list shows.
Related on this site
This article provides general food-data information for education only and does not replace advice from your nephrologist or renal dietitian. Ratings are computed per 100 g against stage 3-4 daily limits (phosphorus 1,000 mg, sodium 2,000 mg, potassium 2,000 mg) from USDA FoodData Central.