Protein content
2.8 g of protein in 1 cup sliced (86 g) of oyster mushrooms, or 10 g for every 100 kcal it supplies.
Share of this food's calories that come from protein - it is very protein-dense.
| Protein per 100 kcal | 10 g |
|---|---|
| Protein per 100 g | 3.31 g |
| Protein per serving | 2.8 g in 1 cup sliced (86 g) |
| Calories from protein | 40% |
| Leucine per serving | 0.14 g |
| Rank in vegetables, per 100 kcal | 16th of 105 |
| Rank of all foods, per 100 g | 603rd of 796 |
| Share of 50 g Daily Value | 6% per serving |
| Protein quality | Incomplete protein |
One 1 cup sliced, 2.8 g protein.
Every 100 kcal of oyster mushrooms brings 10 g of protein. On that measure it ranks 16th of the 105 vegetables in this database and 252nd of all 796 foods on the site. Measured by weight instead, its 3.31 g per 100 g ranks 11th in its group.
Protein accounts for roughly 40% of the calories in oyster mushrooms, making it very protein-dense. The rest comes from fat and carbohydrate, so it adds a solid amount of protein while still carrying real energy - useful when you are eating to a calorie target rather than under one.
USDA lists 0.41 g of fat per 100 g of oyster mushrooms, too little for a protein-to-fat ratio to mean much.
Set against acorn squash, another vegetable entry in the database, a serving carries about 0.5 g more protein (acorn squash has 2.3 g per 1 cup cubes baked).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving quoted here is measured by volume at 86 g, and it covers about 6% of the 50 g FDA Daily Value for protein.
Serving sizes
| Portion | Weight | Protein | Calories |
|---|---|---|---|
| 100 g | 100 g | 3.31 g | 33 kcal |
| 1 cup sliced (serving used here) | 86 g | 2.8 g | 28 kcal |
| 1 large | 148 g | 4.9 g | 49 kcal |
| 1 small | 15 g | 0.5 g | 5 kcal |
Portion weights are the household measures listed on the USDA record; protein and calories scale from the per-100 g figures.
Amino acids
| Amino acid | Per 100 g | Per serving | mg per g protein |
|---|---|---|---|
| leucine | 0.168 g | 0.14 g | 51 |
| lysine | 0.126 g | 0.11 g | 38 |
| valine | 0.197 g | 0.17 g | 60 |
| isoleucine | 0.112 g | 0.1 g | 34 |
| threonine | 0.14 g | 0.12 g | 42 |
| phenylalanine | 0.112 g | 0.1 g | 34 |
| methionine | 0.042 g | 0.04 g | 13 |
| histidine | 0.07 g | 0.06 g | 21 |
| tryptophan | 0.042 g | 0.04 g | 13 |
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 vegetables per serving · Most protein-dense foods · Highest protein per 100 g
Quick answers
3.31 g. The 1 cup sliced serving used on this page weighs 86 g and so carries 2.8 g.
10 g. That figure divides its 3.31 g of protein per 100 g by its 33 kcal per 100 g, so it does not depend on serving size.
No. On its own, the protein in oyster mushrooms is short of at least one essential amino acid; other protein sources across the day fill the gap.
About 6%. One 1 cup sliced serving has 2.8 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #168580 (Mushrooms, oyster, 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.