Abstract
The research investigated the production of bar soap formulation using waste cooking oil (WCO) and avocado waste extract as a filler to enhance its functional properties and provide additional benefits for human skin. The research involved refining WCO, extracting avocado seed and peel bioactive compounds, preparing the solid soap formulation, and conducting various tests to evaluate its pH, cleansing ability, organoleptic properties, and irritation potential. The results indicated that all of the soap formulations met Indonesia National Standard (SNI) for pH and exhibited comparable cleansing power to commercial soaps. Organoleptic tests revealed moderate levels of hardness, foam, odor, texture, and tight impression. Irritation tests identified WCO bar soap that four of six formulations did not cause skin irritation. Overall, the WCO bar soap containing 10% (w/w) avocado peel extract, demonstrated promising properties and met all the established criteria. Future research should focus on characterizing specific chemical compounds in the soap, exploring additional natural extracts with antioxidant and anti-allergic activities, and further analysis quantitatively is required to ensure the product's quality and clinical efficacy.
Published Version
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