United States Department of Agriculture
Agricultural Research Service

National Nutrient Database for Standard Reference Release 28
Full Report (All Nutrients):  12220, Seeds, flaxseed a  b 
Food Group: Nut and Seed Products
Scientific Name:  Linum usitatissimum
Carbohydrate Factor: 4.07   Fat Factor:8.37   Protein Factor: 3.47   Nitrogen to Protein Conversion Factor: 5.3  
heading Nutrient Unit
Value per 100 g
# of Data Points Std. Error
tbsp, whole 10.3 g

cup, whole 168 g

tbsp, ground 7 g

tsp, whole 3.4 g

tsp, ground 2.5 g
Proximates Water 2, 3 g 6.96 3 1.636 0.72 11.69 0.49 0.24 0.17
Proximates Energy kcal 534 -- -- 55 897 37 18 13
Proximates Energy kJ 2234 -- -- 230 3753 156 76 56
Proximates Protein 1, 2, 3 g 18.29 7 0.917 1.88 30.73 1.28 0.62 0.46
Proximates Total lipid (fat) 1, 3 g 42.16 6 3.188 4.34 70.83 2.95 1.43 1.05
Proximates Ash 2, 3 g 3.72 3 0.026 0.38 6.25 0.26 0.13 0.09
Proximates Carbohydrate, by difference g 28.88 -- -- 2.97 48.52 2.02 0.98 0.72
Proximates Fiber, total dietary 2, 3 g 27.3 3 0.323 2.8 45.9 1.9 0.9 0.7
Proximates Sugars, total g 1.55 -- -- 0.16 2.60 0.11 0.05 0.04
Proximates Sucrose 2, 3 g 1.15 3 0.310 0.12 1.93 0.08 0.04 0.03
Proximates Glucose (dextrose) 2, 3 g 0.40 3 0.190 0.04 0.67 0.03 0.01 0.01
Proximates Fructose 2, 3 g 0.00 3 0.000 0.00 0.00 0.00 0.00 0.00
Proximates Lactose 2, 3 g 0.00 3 0.000 0.00 0.00 0.00 0.00 0.00
Proximates Maltose 2, 3 g 0.00 3 0.000 0.00 0.00 0.00 0.00 0.00
Proximates Galactose g 0.00 -- -- 0.00 0.00 0.00 0.00 0.00
Minerals Calcium, Ca 1, 2, 3 mg 255 7 35.614 26 428 18 9 6
Minerals Iron, Fe 1, 2, 3 mg 5.73 7 0.555 0.59 9.63 0.40 0.19 0.14
Minerals Magnesium, Mg 1, 2, 3 mg 392 7 20.100 40 659 27 13 10
Minerals Phosphorus, P 2, 3 mg 642 3 20.250 66 1079 45 22 16
Minerals Potassium, K 1, 2, 3 mg 813 7 9.340 84 1366 57 28 20
Minerals Sodium, Na 1, 2, 3 mg 30 7 3.989 3 50 2 1 1
Minerals Zinc, Zn 1, 2, 3 mg 4.34 7 0.118 0.45 7.29 0.30 0.15 0.11
Minerals Copper, Cu 1, 2, 3 mg 1.220 7 0.075 0.126 2.050 0.085 0.041 0.030
Minerals Manganese, Mn 1, 2, 3 mg 2.482 7 0.186 0.256 4.170 0.174 0.084 0.062
Minerals Selenium, Se 3 µg 25.4 2 -- 2.6 42.7 1.8 0.9 0.6
Vitamins Vitamin C, total ascorbic acid 2, 3 mg 0.6 3 0.108 0.1 1.0 0.0 0.0 0.0
Vitamins Thiamin 2, 3 mg 1.644 3 1.111 0.169 2.762 0.115 0.056 0.041
Vitamins Riboflavin 2, 3 mg 0.161 3 0.071 0.017 0.270 0.011 0.005 0.004
Vitamins Niacin 2, 3 mg 3.080 3 0.130 0.317 5.174 0.216 0.105 0.077
Vitamins Pantothenic acid 2, 3 mg 0.985 3 0.415 0.101 1.655 0.069 0.033 0.025
Vitamins Vitamin B-6 2, 3 mg 0.473 3 0.138 0.049 0.795 0.033 0.016 0.012
Vitamins Folate, total 2, 3 µg 87 3 24.975 9 146 6 3 2
Vitamins Folic acid µg 0 -- -- 0 0 0 0 0
Vitamins Folate, food µg 87 3 24.975 9 146 6 3 2
Vitamins Folate, DFE µg 87 -- -- 9 146 6 3 2
Vitamins Choline, total 3 mg 78.7 -- -- 8.1 132.2 5.5 2.7 2.0
Vitamins Betaine 3 mg 3.1 1 -- 0.3 5.2 0.2 0.1 0.1
Vitamins Vitamin B-12 2 µg 0.00 1 -- 0.00 0.00 0.00 0.00 0.00
Vitamins Vitamin B-12, added µg 0.00 -- -- 0.00 0.00 0.00 0.00 0.00
Vitamins Vitamin A, RAE 2, 3 µg 0 3 0.000 0 0 0 0 0
Vitamins Retinol µg 0 -- -- 0 0 0 0 0
Vitamins Carotene, beta 2, 3 µg 0 3 0.000 0 0 0 0 0
Vitamins Carotene, alpha 2, 3 µg 0 3 0.000 0 0 0 0 0
Vitamins Cryptoxanthin, beta 3 µg 0 2 -- 0 0 0 0 0
Vitamins Vitamin A, IU 2, 3 IU 0 3 0.000 0 0 0 0 0
Vitamins Lycopene 3 µg 0 2 -- 0 0 0 0 0
Vitamins Lutein + zeaxanthin 1 µg 651 9 52.611 67 1094 46 22 16
Vitamins Vitamin E (alpha-tocopherol) 1, 3 mg 0.31 6 0.006 0.03 0.52 0.02 0.01 0.01
Vitamins Vitamin E, added mg 0.00 -- -- 0.00 0.00 0.00 0.00 0.00
Vitamins Tocopherol, beta 3 mg 0.00 2 -- 0.00 0.00 0.00 0.00 0.00
Vitamins Tocopherol, gamma 1, 3 mg 19.95 6 5.066 2.05 33.52 1.40 0.68 0.50
Vitamins Tocopherol, delta 1, 3 mg 0.35 6 0.131 0.04 0.59 0.02 0.01 0.01
Vitamins Vitamin D (D2 + D3) µg 0.0 -- -- 0.0 0.0 0.0 0.0 0.0
Vitamins Vitamin D IU 0 -- -- 0 0 0 0 0
Vitamins Vitamin K (phylloquinone) 3 µg 4.3 2 -- 0.4 7.2 0.3 0.1 0.1
Lipids Fatty acids, total saturated g 3.663 -- -- 0.377 6.154 0.256 0.125 0.092
Lipids 4:0 g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids 6:0 g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids 8:0 3 g 0.000 2 -- 0.000 0.000 0.000 0.000 0.000
Lipids 10:0 3 g 0.000 2 -- 0.000 0.000 0.000 0.000 0.000
Lipids 12:0 3 g 0.000 2 -- 0.000 0.000 0.000 0.000 0.000
Lipids 14:0 2, 3 g 0.008 3 0.008 0.001 0.013 0.001 0.000 0.000
Lipids 15:0 2 g 0.005 1 -- 0.001 0.008 0.000 0.000 0.000
Lipids 16:0 1, 2, 3 g 2.165 7 0.191 0.223 3.637 0.152 0.074 0.054
Lipids 17:0 2 g 0.018 1 -- 0.002 0.030 0.001 0.001 0.000
Lipids 18:0 1, 2, 3 g 1.330 7 0.064 0.137 2.234 0.093 0.045 0.033
Lipids 20:0 2, 3 g 0.052 3 0.005 0.005 0.087 0.004 0.002 0.001
Lipids 22:0 2, 3 g 0.052 3 0.011 0.005 0.087 0.004 0.002 0.001
Lipids 24:0 2, 3 g 0.031 3 0.001 0.003 0.052 0.002 0.001 0.001
Lipids Fatty acids, total monounsaturated g 7.527 -- -- 0.775 12.645 0.527 0.256 0.188
Lipids 16:1 undifferentiated 2, 3 g 0.024 3 0.006 0.002 0.040 0.002 0.001 0.001
Lipids 18:1 undifferentiated 1, 2, 3 g 7.359 7 0.132 0.758 12.363 0.515 0.250 0.184
Lipids 20:1 2, 3 g 0.067 3 0.016 0.007 0.113 0.005 0.002 0.002
Lipids 22:1 undifferentiated 2, 3 g 0.013 3 0.013 0.001 0.022 0.001 0.000 0.000
Lipids 24:1 c 2, 3 g 0.064 3 0.056 0.007 0.108 0.004 0.002 0.002
Lipids Fatty acids, total polyunsaturated g 28.730 -- -- 2.959 48.266 2.011 0.977 0.718
Lipids 18:2 undifferentiated 1, 2, 3 g 5.903 7 0.341 0.608 9.917 0.413 0.201 0.148
Lipids 18:3 undifferentiated 1, 2, 3 g 22.813 7 1.439 2.350 38.326 1.597 0.776 0.570
Lipids 18:4 g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids 20:2 n-6 c,c 2, 3 g 0.007 3 0.007 0.001 0.012 0.000 0.000 0.000
Lipids 20:4 undifferentiated g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids 20:5 n-3 (EPA) g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids 22:5 n-3 (DPA) g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids 22:6 n-3 (DHA) g 0.000 -- -- 0.000 0.000 0.000 0.000 0.000
Lipids Cholesterol mg 0 -- -- 0 0 0 0 0
Lipids Stigmasterol 3 mg 11 2 -- 1 18 1 0 0
Lipids Campesterol 3 mg 45 2 -- 5 76 3 2 1
Lipids Beta-sitosterol 3 mg 90 2 -- 9 151 6 3 2
Amino Acids Tryptophan 1, 3 g 0.297 -- -- 0.031 0.499 0.021 0.010 0.007
Amino Acids Threonine 1, 3 g 0.766 -- -- 0.079 1.287 0.054 0.026 0.019
Amino Acids Isoleucine 1, 3 g 0.896 -- -- 0.092 1.505 0.063 0.030 0.022
Amino Acids Leucine 1, 3 g 1.235 -- -- 0.127 2.075 0.086 0.042 0.031
Amino Acids Lysine 1, 3 g 0.862 -- -- 0.089 1.448 0.060 0.029 0.022
Amino Acids Methionine 1, 3 g 0.370 -- -- 0.038 0.622 0.026 0.013 0.009
Amino Acids Cystine 1, 3 g 0.340 -- -- 0.035 0.571 0.024 0.012 0.009
Amino Acids Phenylalanine 1, 3 g 0.957 -- -- 0.099 1.608 0.067 0.033 0.024
Amino Acids Tyrosine 1, 3 g 0.493 -- -- 0.051 0.828 0.035 0.017 0.012
Amino Acids Valine 1, 3 g 1.072 -- -- 0.110 1.801 0.075 0.036 0.027
Amino Acids Arginine 1, 3 g 1.925 -- -- 0.198 3.234 0.135 0.065 0.048
Amino Acids Histidine 1, 3 g 0.472 -- -- 0.049 0.793 0.033 0.016 0.012
Amino Acids Alanine 1, 3 g 0.925 -- -- 0.095 1.554 0.065 0.031 0.023
Amino Acids Aspartic acid 1, 3 g 2.046 -- -- 0.211 3.437 0.143 0.070 0.051
Amino Acids Glutamic acid 1, 3 g 4.039 -- -- 0.416 6.786 0.283 0.137 0.101
Amino Acids Glycine 1, 3 g 1.248 -- -- 0.129 2.097 0.087 0.042 0.031
Amino Acids Proline 1, 3 g 0.806 -- -- 0.083 1.354 0.056 0.027 0.020
Amino Acids Serine 1, 3 g 0.970 -- -- 0.100 1.630 0.068 0.033 0.024
Amino Acids Hydroxyproline 3 g 0.175 2 -- 0.018 0.294 0.012 0.006 0.004
Other Alcohol, ethyl g 0.0 -- -- 0.0 0.0 0.0 0.0 0.0
Other Caffeine mg 0 -- -- 0 0 0 0 0
Other Theobromine mg 0 -- -- 0 0 0 0 0
Isoflavones Daidzein 4, 5 mg 0.01 4 0.03 0.00 0.03 0.00 0.00 0.00
Isoflavones Genistein 4, 5 mg 0.04 4 0.08 0.00 0.07 0.00 0.00 0.00
Isoflavones Glycitein 4 mg 0.06 1 -- 0.01 0.10 0.00 0.00 0.00
Isoflavones Total isoflavones 4, 5 mg 0.07 4 0.13 0.01 0.12 0.01 0.00 0.00
Isoflavones Biochanin A mg 0.00 3 0 0.00 0.00 0.00 0.00 0.00
Isoflavones Formononetin mg 0.02 4 0.02 0.00 0.03 0.00 0.00 0.00
Isoflavones Coumestrol mg 0.02 4 0.03 0.00 0.04 0.00 0.00 0.00

Sources of Data

1J.K. Daun, R. Przybylski Environmental effects on the composition of four Canadian flax cultivars , 2000 Proceedings of the 58th Meeting of the Flax Institute of the United States    pp.80-91
2Flax Council of Canada Nutrient Analysis of Flaxseed by Medallion Lab , 1997  Winnipeg  
3Nutrient Data Laboratory, ARS, USDA National Food and Nutrient Analysis Program Wave 7h , 2003  Beltsville MD  
4Thompson, L. U., Boucher, B. A., Liu, Z., Cotterchio, M., and Kreiger, N. Phytoestrogen content of foods consumed in Canada, including isoflavones, lignans, and coumestan. , 2006 Nutr. Cancer 54   pp.184-201
5Mazur, W., Fotsis, T., Wähälä, K., Ojala, S., Salakka, A. and Adlercreutz, H. Isotope dilution gas chromatographic-mass spectrometric method for the determination of isoflavonoids, coumestrol, and lignans in food samples. , 1996 Anal. Biochem. 233   pp.169-180

Footnotes

a  Up to 12 percent flax seed can safely be used as an ingredient in food.
b  Other phytosterols = 49.0 mg/100g; these include delta 5-avenasterol (21.2), campestanol (2.8), brassicasterol (1.1) and other minor phytosterols (23.9 mg).