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. 2019 Jan 17;14(1):e0202450. doi: 10.1371/journal.pone.0202450

Table 7. Nutritional tests of wet plant tissue (performed by SCS Global Services in Emeryville, CA) collected by Berkeley Open Source Food in West Oakland, CA, and USDA National Nutrient Database values for raw kale.

chickweed
Stellaria
media
dandelion
Taraxacum
officinale
dock
Rumex
crispus
mallow
Malva
sylvestris
nasturtium
Tropaeolum
majus
oxalis
Oxalis
pes-caprae
kale
Brassica
oleracea
serving (g) 101 70 98 68 72 84 21
cal (Kcal) 29.51 24.40 32.85 35.36 33.78 23.21 7.0
fat cal (Kcal) 2.43 2.43 2.43 2.43 4.60 2.13 2.79
fat (g) 0.27 0.27 0.27 0.27 0.51 0.24 0.31
saturated fat (g) 0.01 0.01 0.02 0.01 0.03 0.01 0.04
TFA (g) 0 0 0 0 0 0 0
cholesterol (mg) 0 0 0 0 0 0 0
carbohydrates (g) 5.27 3.88 4.72 5.30 4.97 4.45 0.93*
dietary fiber (g) 3.69 3.68 3.34 4.88 2.23 2.52 0.90
total sugars (g) 0 0 0 0 0.27 0 0.21
protein (g) 1.45 1.59 2.59 2.78 2.33 0.83 0.61
Vitamin A (IU) 2315.32 4603.9 5311.82 3168.76 5891.04 1998.25 1011.0
Vitamin C (mg) 10.82 3.14 35.63 5.87 1.07 7.93 19.6
Na (mg) 45.83 36.64 99.46 29.07 28.78 24.33 11.0
Ca (mg) 66.92 67.13 67.40 185.39 106.89 41.07 53.0
Fe (mg) 1.56 1.91 1.29 2.27 0.85 1.58 0.34
K (mg) 446.24 308.06 305.40 242.14 214.54 108.21 73.0

Serving sizes for chickweed, dandelion, dock, and kale were 1c; serving sizes for mallow, nasturtium, and oxalis were 1/2c. Masses are listed. “cal” and “Kcal” stand for kilocalories (dietary calories) and “TFA” stands for trans fatty acids. See Table 6 for sample sites. (*This number is suspiciously low—and values listed on other websites are generally 4–6g—but it is the value the USDA lists.)