Protein content
9 g of protein in 1 egg (70 g) of duck egg, or 6.9 g for every 100 kcal it supplies.
Share of this food's calories that come from protein - it is moderately protein-dense.
| Protein per 100 kcal | 6.9 g |
|---|---|
| Protein per 100 g | 12.8 g |
| Protein per serving | 9 g in 1 egg (70 g) |
| Calories from protein | 28% |
| Protein to fat | 0.9 g per 1 g fat |
| Leucine per serving | 0.77 g |
| Rank in eggs, per 100 kcal | 14th of 20 |
| Rank of all foods, per 100 g | 388th of 796 |
| Share of 50 g Daily Value | 18% per serving |
| Protein quality | Complete protein |
One 1 egg, 9 g protein.
Every 100 kcal of duck egg brings 6.9 g of protein. On that measure it ranks 14th of the 20 eggs in this database and 349th of all 796 foods on the site. Measured by weight instead, its 12.8 g per 100 g ranks 9th in its group.
Around 28% of the calories in duck egg come from protein, so it is moderately protein-dense. It contributes to a day's protein total, but the bulk of what it delivers is energy rather than amino acids - treat it as a contributor alongside a denser source, not as the protein in a meal.
By weight, fat outweighs protein in duck egg: 13.8 g of fat per 100 g against 12.8 g of protein, a ratio of 0.9 to 1.
Set against dried egg yolk, another egg entry in the database, a serving carries about 0.7 g less protein (dried egg yolk has 9.7 g per 1 oz).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving quoted here is counted by piece at 70 g, and it covers about 18% of the 50 g FDA Daily Value for protein.
A duck egg is noticeably larger than a chicken egg, so it delivers more per egg.
Serving sizes
| Portion | Weight | Protein | Calories |
|---|---|---|---|
| 100 g | 100 g | 12.8 g | 185 kcal |
| 1 egg (serving used here) | 70 g | 9 g | 130 kcal |
The USDA record lists no other household measure for this food; protein and calories scale from the per-100 g figures.
Amino acids
| Amino acid | Per 100 g | Per serving | mg per g protein |
|---|---|---|---|
| leucine | 1.1 g | 0.77 g | 86 |
| lysine | 0.951 g | 0.67 g | 74 |
| valine | 0.885 g | 0.62 g | 69 |
| isoleucine | 0.598 g | 0.42 g | 47 |
| threonine | 0.736 g | 0.52 g | 57 |
| phenylalanine | 0.84 g | 0.59 g | 66 |
| methionine | 0.576 g | 0.4 g | 45 |
| histidine | 0.32 g | 0.22 g | 25 |
| tryptophan | 0.26 g | 0.18 g | 20 |
Per-100 g values are the amino acid analysis on the USDA record. The serving and per-gram-of-protein columns are arithmetic on those values; they are not a protein quality score.
Related
Highest-protein eggs per serving · Most protein-dense foods · Highest protein per 100 g
Quick answers
12.8 g. The 1 egg serving used on this page weighs 70 g and so carries 9 g.
6.9 g. That figure divides its 12.8 g of protein per 100 g by its 185 kcal per 100 g, so it does not depend on serving size.
Yes. The protein in duck egg supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
About 18%. One 1 egg serving has 9 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #172189 (Egg, duck, whole, fresh, raw), SR Legacy data. USDA data is in the public domain. Values are the published reference figures for that record, not lab measurements for a specific brand or batch.