Concentration is not contribution
Per 100 grams reveals nutrient density. The amount actually eaten determines how much that food contributes to the meal.
Nutrient guides
A nutrient ranking needs a denominator—and a reason.
Explore source-grounded rankings on one consistent basis: the reported amount per 100 grams. Every guide also shows the distribution behind the leaderboard, a concrete case where the serving-based answer reverses, and the exact USDA record beneath each row.
A source serving is not a prescription
The listed measure is a calculation anchor tied to one database record. It is not automatically your portion or a recommendation of how much to eat.
One nutrient is not the whole food
A higher value can answer a specific comparison question. It cannot score the complete meal, diagnose a need, or choose a food for every person.
Choose a comparison
Eight questions, asked of the same source corpus
Each guide uses the same 3,850 USDA survey-food profiles as the meal library, preserves the source record behind every result, and keeps zero values distinct from missing values.
Protein
Protein in foods and meals: compare USDA values
Compare protein per 100 grams and per listed serving across foods and meals using traceable USDA FoodData Central records.
Open guide → Dietary fiberDietary fiber in foods and meals: compare USDA values
Explore foods and meals with more dietary fiber per 100 grams, with source servings, calorie context, and USDA citations.
Open guide → PotassiumPotassium in foods and meals: compare USDA values
Compare potassium density and listed serving amounts across foods and meals using USDA survey-food records.
Open guide → CalciumCalcium in foods and meals: compare USDA values
Compare calcium per 100 grams and per source serving across foods and meals, with transparent USDA provenance.
Open guide → IronIron in foods and meals: compare USDA values
Compare iron density and source-serving amounts across USDA food and meal records without hiding portion differences.
Open guide → Vitamin DVitamin D in foods and meals: compare USDA values
Find USDA food and meal records with more vitamin D per 100 grams and inspect the listed serving behind each value.
Open guide → SodiumSodium in foods and meals: compare USDA values
Compare sodium per 100 grams and per listed serving across foods and meals, with source records and portion cautions.
Open guide → CaloriesCalorie density of foods and meals: a USDA comparison
Compare calories per 100 grams across foods and meals while keeping serving size, ingredients, and preparation uncertainty visible.
Open guide →How to read these pages
Locate the record, understand the distribution, then return to the meal.
The top of a list is often an edge of the corpus, not the center of ordinary eating. Each guide shows the reported-value median—including reported zeros—the 90th-percentile boundary, the observed maximum, and missing-value coverage.
Next, open the exact profile. Check the complete food description, household measures, Feast’s 21-nutrient panel, and variability factors. Daily Values are general food-label references, not personalized requirements; the database’s source amount is not necessarily the portion on your plate.