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Neutralization efficiency (%) of polymyxin (PMB), milk thistle (MT) and silymarin (SM) was tested with a LPS solution with a measured endotoxin activity of 43,533 EU/mL (±2433 EU/mL) at 37 °C for 2 h (n = 3 independent experiments). Error bars display standard deviation. a,b Superscripts indicate significant difference p < 0.05.
