White Button Mushroom — USDA FoodData Central nutrition facts (per 100g)

| Nutrient | Amount per 100g |
| --- | --- |
| Ash | 0.829 g |
| Beta-glucan | 0.75 g |
| Beta-sitostanol | 0 mg |
| Beta-sitosterol | 0 mg |
| Biotin | 9.07 µg |
| Calcium, Ca | 5.46 mg |
| Campesterol | 0 mg |
| Carbohydrate, by difference | 4.08 g |
| Copper, Cu | 0.389 mg |
| Delta-5-avenasterol | 0 mg |
| Delta-7-Stigmastenol | 0 mg |
| Energy | 31.2 kcal |
| Energy (Atwater General Factors) | 31.2 kcal |
| Energy (Atwater Specific Factors) | 24.9 kcal |
| Ergosta-5,7-dienol | 5.84 mg |
| Ergosta-7-enol | 1.63 mg |
| Ergosta-7,22-dienol | 1.54 mg |
| Ergosterol | 55.6 mg |
| Ergothioneine | 4.25 mg |
| Fiber, total dietary | 1.72 g |
| Folate, total | 34.8 µg |
| Glutathione | 4.3 mg |
| Histidine | 0.655 g |
| Iron, Fe | 0.227 mg |
| Isoleucine | 1.15 g |
| Leucine | 1.88 g |
| Lysine | 1.7 g |
| Magnesium, Mg | 10.2 mg |
| Manganese, Mn | 0.054 mg |
| Methionine | 0.37 g |
| Niacin | 3.88 mg |
| Nitrogen | 0.462 g |
| Phenylalanine | 1.12 g |
| Phosphorus, P | 93 mg |
| Potassium, K | 373 mg |
| Protein | 2.89 g |
| Riboflavin | 0.444 mg |
| Selenium, Se | 20 µg |
| Sodium, Na | 6.44 mg |
| Stigmasterol | 0 mg |
| Thiamin | 0.065 mg |
| Threonine | 1.41 g |
| Total lipid (fat) | 0.371 g |
| Tryptophan | 0.477 g |
| Valine | 2.48 g |
| Vitamin B-6 | 0.077 mg |
| Vitamin D (D2 + D3) | 0.022 µg |
| Vitamin D (D2 + D3), International Units | 0.868 IU |
| Vitamin D2 (ergocalciferol) | 0.022 µg |
| Vitamin D4 | 0 µg |
| Water | 91.8 g |
| Zinc, Zn | 0.511 mg |

Values are raw as published by USDA at the 100g basis — not rounded per 21 CFR 101.9(c) label-declaration rules, and 100g is USDA's publication basis, not a serving size any US nutrition label declares against.

Source: USDA FoodData Central, FDC ID 1999629, usda_ff (released 2026-04-30). https://bettermenu.live/tools/ingredient-search/us/foods/white-button-mushroom-1999629/