United States Department of Agriculture
Agricultural Research Service

National Nutrient Database for Standard Reference Legacy Release
Try FoodData Central Basic Report:  11265, Mushrooms, portabella, raw a 
heading Nutrient Unit
Value per 100 g

cup diced 86 g

piece whole 84 g
Proximates Water g 92.82 79.83 77.97
Proximates Energy kcal 22 19 18
Proximates Energy kJ 92 79 77
Proximates Protein g 2.11 1.81 1.77
Proximates Total lipid (fat) g 0.35 0.30 0.29
Proximates Ash g 0.85 0.73 0.71
Proximates Carbohydrate, by difference g 3.87 3.33 3.25
Proximates Fiber, total dietary g 1.3 1.1 1.1
Proximates Sugars, total g 2.50 2.15 2.10
Proximates Sucrose g 0.00 0.00 0.00
Proximates Glucose (dextrose) g 2.01 1.73 1.69
Proximates Fructose g 0.49 0.42 0.41
Proximates Lactose g 0.00 0.00 0.00
Proximates Maltose g 0.00 0.00 0.00
Proximates Galactose g 0.00 0.00 0.00
Minerals Calcium, Ca mg 3 3 3
Minerals Iron, Fe mg 0.31 0.27 0.26
Minerals Phosphorus, P mg 108 93 91
Minerals Potassium, K mg 364 313 306
Minerals Sodium, Na mg 9 8 8
Minerals Zinc, Zn mg 0.53 0.46 0.45
Minerals Copper, Cu mg 0.286 0.246 0.240
Minerals Manganese, Mn mg 0.069 0.059 0.058
Minerals Selenium, Se µg 18.6 16.0 15.6
Vitamins Vitamin C, total ascorbic acid mg 0.0 0.0 0.0
Vitamins Thiamin mg 0.059 0.051 0.050
Vitamins Riboflavin mg 0.130 0.112 0.109
Vitamins Niacin mg 4.494 3.865 3.775
Vitamins Pantothenic acid mg 1.140 0.980 0.958
Vitamins Vitamin B-6 mg 0.148 0.127 0.124
Vitamins Folate, total b µg 28 24 24
Vitamins Folic acid µg 0 0 0
Vitamins Folate, food b µg 28 24 24
Vitamins Folate, DFE b µg 28 24 24
Vitamins Choline, total mg 21.2 18.2 17.8
Vitamins Betaine mg 6.1 5.2 5.1
Vitamins Vitamin B-12 µg 0.05 0.04 0.04
Vitamins Vitamin B-12, added µg 0.00 0.00 0.00
Vitamins Vitamin A, RAE µg 0 0 0
Vitamins Retinol µg 0 0 0
Vitamins Carotene, beta µg 0 0 0
Vitamins Carotene, alpha µg 0 0 0
Vitamins Cryptoxanthin, beta µg 0 0 0
Vitamins Vitamin A, IU IU 0 0 0
Vitamins Lycopene µg 0 0 0
Vitamins Lutein + zeaxanthin µg 0 0 0
Vitamins Vitamin E (alpha-tocopherol) mg 0.02 0.02 0.02
Vitamins Vitamin E, added mg 0.00 0.00 0.00
Vitamins Tocopherol, beta mg 0.00 0.00 0.00
Vitamins Tocopherol, gamma mg 0.00 0.00 0.00
Vitamins Tocopherol, delta mg 0.00 0.00 0.00
Vitamins Tocotrienol, alpha mg 0.02 0.02 0.02
Vitamins Tocotrienol, beta mg 0.00 0.00 0.00
Vitamins Tocotrienol, gamma mg 0.00 0.00 0.00
Vitamins Tocotrienol, delta mg 0.00 0.00 0.00
Vitamins Vitamin D (D2 + D3) µg 0.3 0.3 0.3
Vitamins Vitamin D2 (ergocalciferol) µg 0.3 0.3 0.3
Vitamins Vitamin D3 (cholecalciferol) µg 0.0 0.0 0.0
Vitamins Vitamin D IU 10 9 8
Vitamins Vitamin K (phylloquinone) µg 0.0 0.0 0.0
Lipids Fatty acids, total saturated g 0.010 0.009 0.008
Lipids 4:0 g 0.000 0.000 0.000
Lipids 15:0 g 0.003 0.003 0.003
Lipids 17:0 g 0.003 0.003 0.003
Lipids 20:0 g 0.003 0.003 0.003
Lipids 22:0 g 0.003 0.003 0.003
Lipids 24:0 g 0.000 0.000 0.000
Lipids Fatty acids, total monounsaturated g 0.044 0.038 0.037
Lipids 14:1 g 0.001 0.001 0.001
Lipids 15:1 g 0.000 0.000 0.000
Lipids 16:1 undifferentiated g 0.008 0.007 0.007
Lipids 16:1 c g 0.005 0.004 0.004
Lipids 16:1 t g 0.000 0.000 0.000
Lipids 17:1 g 0.000 0.000 0.000
Lipids 18:1 undifferentiated g 0.016 0.014 0.013
Lipids 18:1 c g 0.014 0.012 0.012
Lipids 18:1 t g 0.000 0.000 0.000
Lipids 22:1 undifferentiated g 0.000 0.000 0.000
Lipids 22:1 c g 0.000 0.000 0.000
Lipids 22:1 t g 0.000 0.000 0.000
Lipids 24:1 c g 0.000 0.000 0.000
Lipids Fatty acids, total polyunsaturated g 0.296 0.255 0.249
Lipids 18:2 undifferentiated g 0.148 0.127 0.124
Lipids 18:2 n-6 c,c g 0.148 0.127 0.124
Lipids 18:2 CLAs g 0.000 0.000 0.000
Lipids 18:2 t not further defined g 0.000 0.000 0.000
Lipids 18:3 undifferentiated g 0.000 0.000 0.000
Lipids 18:3 n-3 c,c,c (ALA) g 0.000 0.000 0.000
Lipids 18:3 n-6 c,c,c g 0.000 0.000 0.000
Lipids 20:2 n-6 c,c g 0.000 0.000 0.000
Lipids 20:3 undifferentiated g 0.000 0.000 0.000
Lipids 20:3 n-6 g 0.000 0.000 0.000
Lipids 22:4 g 0.000 0.000 0.000
Lipids Fatty acids, total trans g 0.000 0.000 0.000
Lipids Fatty acids, total trans-monoenoic g 0.000 0.000 0.000
Lipids Cholesterol mg 0 0 0
Lipids Stigmasterol mg 0 0 0
Lipids Campesterol mg 2 2 2
Lipids Beta-sitosterol mg 0 0 0
Amino Acids Tryptophan g 0.035 0.030 0.029
Amino Acids Threonine g 0.101 0.087 0.085
Amino Acids Isoleucine g 0.082 0.071 0.069
Amino Acids Leucine g 0.130 0.112 0.109
Amino Acids Lysine g 0.122 0.105 0.102
Amino Acids Methionine g 0.029 0.025 0.024
Amino Acids Cystine g 0.010 0.009 0.008
Amino Acids Phenylalanine g 0.076 0.065 0.064
Amino Acids Tyrosine g 0.014 0.012 0.012
Amino Acids Valine g 0.076 0.065 0.064
Amino Acids Arginine g 0.082 0.071 0.069
Amino Acids Histidine g 0.058 0.050 0.049
Amino Acids Alanine g 0.168 0.144 0.141
Amino Acids Aspartic acid g 0.221 0.190 0.186
Amino Acids Glutamic acid g 0.319 0.274 0.268
Amino Acids Glycine g 0.096 0.083 0.081
Amino Acids Proline g 0.076 0.065 0.064
Amino Acids Serine g 0.092 0.079 0.077
Other Alcohol, ethyl g 0.0 0.0 0.0
Other Caffeine mg 0 0 0
Other Theobromine mg 0 0 0

Sources of Data

1Mushroom Council National Food and Nutrient Analysis Program Wave 13d , 2009  Dublin CA  
2Mushroom Council National Food and Nutrient Analysis Program Wave 9b , 2004  Dublin CA  

Footnotes
a  Ergosterol = 56 mg/100 g.
b  Mean value contains data based on the analysis of 5-methyltetrahydrofolate, 10-Formyl folic acid, and 5-Formyltetrahydrofolic acid plus total folate determined microbiologically
b  Mean value contains data based on the analysis of 5-methyltetrahydrofolate, 10-Formyl folic acid, and 5-Formyltetrahydrofolic acid plus total folate determined microbiologically
b  Mean value contains data based on the analysis of 5-methyltetrahydrofolate, 10-Formyl folic acid, and 5-Formyltetrahydrofolic acid plus total folate determined microbiologically