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Table 5 Inhibition of tyrosinase and collagenase activities by Thai plant extracts

From: Thai plants with high antioxidant levels, free radical scavenging activity, anti-tyrosinase and anti-collagenase activity

Plant Extract Tyrosinase inhibition (%) Collagenase inhibition(%)
Annona squamosa Linn. Ethanol 21.92 ± 1.45** 55.12 ± 3.18***
Ardisia elliptica Thunb. Petroleum ether 19.42 ± 1.21** NA
Ardisia elliptica Thunb. Dichloromethane 21.40 ± 1.61** NA
Ardisia elliptica Thunb. Ethanol 49.54 ± 1.23*** 94.88 ± 6.93***
Croton sublyratus Kurz Ethanol NA 24.14 ± 0.98**
Datura metel L. Ethanol 20.91 ± 1.70** NA
Ipomoea pes-caprae (L.) R.br. Ethanol 23.01 ± 1.65** NA
Phyllanthus acidus (L.) Skeels. Ethanol 42.92 ± 3.85*** NA
Rhinacanthus nasutus (L.) Kurz Ethanol 64.68 ± 5.46*** NA
Senna alata (L.) Roxb. Ethanol 23.49 ± 1.09** 41.49 ± 2.63***
Kojid acid (tyrosinase inhibitor)   93.38 ± 1.63***  
Epigallatecathechin gallate
(collagenase inhibitor)
  90.51 ± 2.79***
  1. Each value is mean ± S.D. of triplicate independent analyses. Significantly different from the control group
  2. (* P < 0.05, ** P < 0.01, *** P < 0.001). NA not available