L-Ornithine L-Aspartate + Silymarin is a combination of two medicines. L-Ornithine L-Aspartate is a combination of two amino acids which works by protecting the liver from harmful chemical substances (free radicals), thus preventing liver damage. Silymarin is an active principle obtained from milk thistle seed (Silybum marianum). It might protect liver cells from toxic chemicals and drugs. It also seems to have antioxidant and anti-inflammatory effects.