Development and evaluation of liquid crystal o/w emulsion systems containing pequi oil (Caryocar Brasiliense camb.) and biopeptides

Pequi (Caryocar brasiliense) is an oleaginous fruit containing high amounts of fatty acids. It also contains carotenoids and other phenolic compounds, which possess anti-oxidant and anti-inflammatory actions. Emulsions containing liquid crystals are stable systems which interact efficiently with the skin due to their biomimetic properties. Nowadays, biomimetic peptides have been widely used in the cosmetic industry as they act via different mechanisms in order to stimulate fiber renewal. This work aimed to develop and evaluate the physicochemical stability of four liquid crystal O/W emulsion systems containing pequi oil and biopeptides. The obtained results evidenced the formulations had a microstructural organization with formation of liquid-crystal phases which remained stable during stability assays at several heat and time variations. Formulations named A, B, C and D had the same organoleptic characteristics. Formulations developed with [Cetearyl Alcohol (and) Glyceryl Stearate (and) PEG-40 Stearate (and) Ceteareth-20] had a more homogeneous internal structure due to addition (formulation D) or not (formulation B) of active compounds pequi oil or biopeptides.