Clays and organic thickeners, such as gums, are often used synergistically in cosmetic products to provide a balance of suspension stability. The gums' protective colloidal action improves clay stability in the presence of electrolytes, surfactants, water-solubles, and even against phase separation (11,17). This fact was also observed in this study, once hydroxypropyl starch phosphate (F1) and xantham (F3) gums promoted stability in both formulations after centrifuge testing, preventing phase separation. Therefore, only the F1 and F3 formulations were classified as normal after PST, and they were submitted to AST.