Vegetables
Mushrooms nutrition facts
A 1 undetermined small (10 g) serving of mushrooms provides 2 calories, 0 g protein, 0 g carbohydrate, and 0 g fat — about 43% of its calories from protein, 46% from carbohydrate, and 11% from fat. The interactive label below toggles between a serving and 100 g.
Calorie split
| Nutrient | Per 1 undetermined small (10 g) | Per 100 g |
|---|---|---|
| Calories | 2 | 22 |
| Protein | 0 g | 3 g |
| Total carbohydrate | 0 g | 3 g |
| Total fat | 0 g | 0 g |
Vitamins & minerals
Per serving (10 g)
- Vitamin C
- 0.21 mg
- Vitamin E
- 0.00 mg
- Thiamin (B1)
- 0.01 mg
- Riboflavin (B2)
- 0.04 mg
- Niacin (B3)
- 0.36 mg
- Vitamin B6
- 0.01 mg
- Folate (DFE)
- 1.70 mcg
- Vitamin B12
- 0.00 mcg
- Magnesium
- 0.90 mg
- Phosphorus
- 8.60 mg
- Zinc
- 0.05 mg
- Copper
- 0.03 mg
- Manganese
- 0.00 mg
- Selenium
- 0.93 mcg
Photo by Waldemar Brandt on Unsplash
Selecting, storing & prepping mushrooms
- Selecting
- Choose mushrooms with a dry surface and caps that feel firm, not slimy or wrinkled.
- Storing
- Best kept in their original packaging or a paper bag, not sealed plastic, which traps moisture — good for 3–7 days refrigerated. For freezing, cook or sauté them first; freezing them raw turns them rubbery once thawed, but cooked mushrooms freeze well for up to a year.
- Prepping
- Wipe mushrooms clean with a damp cloth or paper towel rather than rinsing under water — they absorb moisture quickly, which can make them soggy when cooked.
Storage guidance from the USDA FoodKeeper database (FSIS, Cornell University, and the Food Marketing Institute).
Nutrition highlights
Per 1 undetermined small (10 g), mushrooms provides 0 g protein, 0 g carbohydrate, and 0 g fat, with no single vitamin or mineral reaching 10% of the Daily Value.
% of the FDA Daily Value per 1 undetermined small (10 g) serving.
Key metrics
Nutrient density
Per 100 kcal, mushrooms delivers about 21% of a Daily Value on average across 22 beneficial nutrients. The score is its percentile for that measure among the 177 foods in our database — higher means more nutrition per calorie. How this is calculated.
Density counts protein, fiber, and vitamins and minerals (not fat, sodium, or sugar), each capped so a single nutrient can’t dominate, with a calorie floor so very-low-calorie foods aren’t overstated. It measures nutrition per calorie within our database — a useful guide, not a complete verdict on how “healthy” a food is.
Similar foods & swaps
The closest vegetables to mushrooms by nutrition (per 100 g), and how each differs.
Questions
- How many calories are in mushrooms?
- A 1 undetermined small (10 g) serving of mushrooms has about 2 calories. Per 100 g, it has 22 calories — a very low calorie density.
- How much protein is in mushrooms?
- Mushrooms provides about 0 g of protein per 1 undetermined small (10 g) serving.
- What are the macros in mushrooms?
- Per serving, mushrooms has roughly 0 g protein, 0 g carbohydrate, and 0 g fat. By calories, that is 43% protein, 46% carbohydrate, and 11% fat.
- Is mushrooms high in protein?
- Mushrooms has a protein density of about 14 g per 100 kcal, and 43% of its calories come from protein. Foods above roughly 10 g per 100 kcal are generally considered protein-dense.
- What vitamins and minerals are in mushrooms?
- Mushrooms contains small amounts of several vitamins and minerals; see the full label above for the complete micronutrient breakdown.
- What is the nutritional value of mushrooms?
- Per 1 undetermined small (10 g), mushrooms has 2 calories, 0 g protein, 0 g carbohydrate, and 0 g fat. See the full nutrition facts label above for every vitamin and mineral.
Use it
More vegetables
References & methodology
- Data source: U.S. Department of Agriculture, Agricultural Research Service — FoodData Central, FDC ID 169251 (public domain).
- Daily Values: FDA Nutrition Facts label, 2016 update (adults and children aged 4+).
- Source claims: a serving supplying 10–19% of the Daily Value is a “good source”; 20% or more is an “excellent source” (FDA, 21 CFR 101.54).
- Calorie split: Atwater general factors — 4 kcal/g for protein and carbohydrate, 9 kcal/g for fat.
- Last reviewed: June 2026. Values are typical figures and vary with variety, ripeness, and preparation.
NutriFactsHub. “Mushrooms Nutrition Facts.” https://nutrifactshub.com/foods/mushrooms