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Table 3 Vitamin composition of uncooked and cooked indigenous vegetable (mg/100 g)

From: Impact of cooking methods on the chemical and antioxidant composition of some indigenous vegetables used in different food dishes in Southeast Nigeria

Sample

β-Carotene

B1

B2

B3

Vit. C

Uziza leaf (Piper guineense)

Uncooked

66.22d ± 0.01

0.03f ± 0.01

0.02e ± 0.01

0.06e ± 0.01

2.54d ± 0.00

Blanched

45.03d ± 0.03

0.01f ± 0.01

0.01d ± 0.01

0.04d ± 0.02

2.00d ± 0.01

Sautéed

70.62d ± 0.02

0.06f ± 0.01

0.04f ± 0.01

0.11d ± 0.01

2.04d ± 0.02

Nchuanwu (scent) leaf (Ocimum gratissimum)

Uncooked

20.54e ± 0.01

0.27e ± 0.02

0.05e ± 0.01

0.12d ± 0.01

15.78c ± 0.02

Blanched

9.96e ± 0.03

0.08d ± 0.01

0.01d ± 0.01

0.04d ± 0.02

7.15c ± 0.02

Sautéed

25.32e ± 0.02

0.06e ± 0.02

0.09e ± 0.01

0.10d ± 0.01

11.59c ± 0.02

Anara (garden egg) leaf (Solanum melongena)

Uncooked

312.33b ± 0.03

10.67a ± 0.01

0.62b \(\pm\) 0.03

0.22c ± 0.01

2.40e ± 0.02

Blanched

259.76a ± 0.04

4.95a ± 0.02

0.25b ± 0.02

0.09c ± 0.01

0.97e ± 0.01

Sautéed

315.38b ± 0.02

7.53a ± 0.01

0.31b ± 0.01

0.19c ± 0.00

1.09f ± 0.04

Utazi leaf (Gongronema latifolium)

Uncooked

3.94f ± 0.03

0.81b ± 0.01

0.96a ± 0.27

1.19a ± 0.02

20.03b ± 0.02

Blanched

0.92f ± 0.01

0.32c ± 0.02

0.61a ± 0.02

0.69a ± 0.01

10.24b ± 0.03

Sautéed

4.15f ± 0.03

0.87b ± 0.04

0.72a ± 0.03

0.88a ± 0.02

16.66b ± 0.01

Okazi leaf (Gnetum africanum)

Uncooked

319.23a ± 0.03

0.52c ± 0.02

0.13d ± 0.01

0.47b ± 0.02

1.27f ± 0.02

Blanched

252.97b ± 0.03

0.44b ± 0.04

0.80c ± 0.03

0.31b ± 0.01

0.92c ± 0.01

Sautéed

325.32a ± 0.02

0.61c ± 0.01

0.19d ± 0.02

0.62b ± 0.03

1.20e ± 0.01

Onugbu (bitter) leaf (Vernonia amygdalina)

Uncooked

220.75c ± 0.03

0.36d ± 0.01

0.41c ± 0.01

0.11d ± 0.02

62.39a ± 0.02

Blanched

194.07c ± 0.03

0.05ed ± 0.03

0.95c ± 0.01

0.05d ± 0.01

52.63a ± 0.03

Sautéed

231.72c ± 0.03

0.19d ± 0.03

0.26c ± 0.01

0.09d ± 0.01

57.50a ± 0.02

  1. Mean ± standard deviation for duplicate determination. Values with different superscripts in the same column are significantly different (p < 0.05)