US Patent 9642788 Shampoo composition comprising gel matrix and histidine

A shampoo composition having from about 0.025% to about 0.25% histidine, by weight of the shampoo composition; from about 2% to about 50% of one or more detersive surfactants, by weight of the shampoo composition; and a gel matrix having from about 0.1% to about 20% of one or more fatty alcohols, by weight of the gel matrix; from about 0.1% to about 10% of one or more gel matrix surfactants, by weight of the gel matrix; and from about 20% to about 95% of an aqueous carrier, by weight of the gel matrix.