Carotenoid composition and vitamin A activity of medicinally important green leafy vegetables

  • Raju M
  • Varakumar S
  • Lakshminarayana R
 et al. 
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Abstract

Carotenoid composition of green leafy vegetables (GLVs, n = 30) with medicinal value was analyzed by HPLC; vitamin A activity (as retinol equivalent, RE) of provitamin A carotenoids was calculated. Results show that among GLVs studied, the level of β-carotene (50-130 mg/100 g dry wt) was higher in nine GLVs than other carotenoids while lutein (50-187 mg/100 g dry wt) and zeaxanthin (1-5 mg/100 g dry wt) were higher in 12 GLVs than other xanthophylls. α-Carotene was detected only in nine GLVs, ranging from 1 to 37 mg/100 g dry wt. Interestingly, Chenopodium album, Commelina benghalensis and Solanum nigrum were found to contain higher levels of both lutein and β-carotene in the range of 84-187 and 50-115 mg/100 g dry wt, respectively. The values of retinol equivalents (RE) ranged from 641 to 19101 and were higher (>10,000) in six GLVs of the 30. The results demonstrate that GLVs studied contained higher levels of RE and lutein. © 2006 Published by Elsevier Ltd.

Author-supplied keywords

  • Carotenoids
  • Chromatography
  • Leafy vegetables
  • Vitamin A activity

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