Preservative systems and compositions comprising the same

A wash composition comprising a preservative system, an acyl isethionate, a zwitterionic surfactant comprising a betaine, a sultaine or both and the composition has a pH from 6 to 7.8, wherein the preservative system comprises:

• (a) a first component comprising a substituted amino acid;
• and
• (b) a second component comprising benzoic acid and/or a derivative thereof,
• wherein the first component and second component are present at a weight ratio from 1:4 to 4:1, and further wherein the composition optionally comprises sodium dehydroacetate, and when present, the sodium dehydroacetate and the second component are present at amounts where the sodium dehydroacetate makes up less than 5% by weight based on total weight of sodium dehydroacetate and second component in the preservative system, the composition comprising from 30 to 82% by weight water and wherein no preservative is present in the composition in addition to the first component and second component, and further wherein the first component is decanoyl glycine, N-capryloyl glycine, N-undecylenoyl glycine, N-undecylenoyl phenylalanine or a mixture thereof;
• and the second component is sodium benzoate, potassium benzoate, amino benzoate or a mixture thereof, and the zwitterionic surfactant is a betain comprising cocamidopropyl betaine, and the acyl isethionate, is sodium lauroyl isethionate, sodium cocyl isethionate or a mixture thereof, and the composition comprises an additional surfactact comprising sodium lauroyl glycinate, sodium cocoyl glycinate, sodium methyl lauroyl taurate, sodium methyl cocoyl taurate or a mixture thereof.