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Table 2 Cytotoxicity studies showing the % cell viability (N = 6, ± SEM) when treated with various concentrations of extracts and products using the neutral red assay.

From: Antioxidant and potential anti-inflammatory activity of extracts and formulations of white tea, rose, and witch hazel on primary human dermal fibroblast cells

Product 25% 12.50% 6.25% 3.12% 1.56% 0.78% 0.39%
WTEG 1NT 1NT 93.84 ± 2.05 92.99 ± 2.24 98.87 ± 1.81 98.27 ± 2.89 100.66 ± 2.83
WHD 99.77 ± 0.83 99.88 ± 2.53 102.35 ± 1.21 101.47 ± 3.36 102.10 ± 3.41 1NT 1NT
Extract 200 μg 100 μg 50 μg 25 μg 12.5 μg   
WT 112.97 ± 1.55 102.39 ± 1.59 88.08 ± 2.03 83.076 ± 6.26 76.37 ± 5.63   
RT 93.17 ± 4.65 96.67 ± 0.92 94.24 ± 5.77 92.52 ± 6.27 94.41 ± 7.78   
WH 96.90 ± 2.055 95.57 ± 3.95 91.47 ± 5.77 101.42 ± 3.65 99.26 ± 2.83   
  1. 1NT indicates not tested at these concentrations due to solubility ability