Analysis of the Influence of Lipid Components on the Spreadability of Hair Heat Protectants by Central Composite Design

This study investigates the impact of lipid components on the spreadability of hair heat protectants, which is crucial for effective thermal protection. Using a central composite rotational design, the research analyzed the spreadability of formulations containing cetostearyl alcohol, shea butter, and coconut oil, with concentrations ranging from 0.64% to 7.36%. The results showed that spreadability was significantly influenced by the concentration of these components (p < 0.05). Optimal spreadability was achieved with 4% concentrations of shea butter and coconut oil and a low concentration of cetostearyl alcohol (0.64%). These findings suggest that the formulation of heat protectants can be optimized to ensure adequate coverage and protection of the hair shaft.