This project focuses on creating a sleeping mask that incorporates β-carotene extracted from carrot peels, aiming to reduce acne scars and dark spots. Carrot peels, often discarded as waste, are an abundant source of β-carotene, which is a precursor to vitamin A, known for its skin-rejuvenating properties. The main objective of this study was to efficiently extract β-carotene from carrot peels and develop a sleeping mask capable of reducing post-acne hyperpigmentation. The extraction process was optimized using various solvents, with 95% ethanol yielding the highest concentration and purity of β-carotene. Afterward, a sleeping mask formula was developed, containing 2% β-carotene. The mask was tested for stability under various storage conditions, where it demonstrated excellent durability, showing no signs of phase separation. The mask's effectiveness was evaluated over four weeks, with participants reporting an average reduction of 35% in dark spots, which was notably higher compared to the 10% reduction observed in the control group. The findings reveal that β-carotene from carrot peels can be effectively utilized in skincare products, offering a natural solution for treating acne scars while also promoting environmental sustainability. Not only does this study demonstrate the potential of upcycling organic waste into valuable skincare products, but it also provides a practical way to reduce post-acne hyperpigmentation through a natural, skin-friendly approach. In conclusion, this study shows that the 2% β-carotene sleeping mask formula, derived from carrot peel waste, is an effective and eco-friendly product for reducing acne scars. It highlights the dual benefits of contributing to sustainable practices by reducing organic waste while also providing a natural skincare solution for consumers. This innovative product holds promise for future development and could have a significant impact on both skincare routines and waste reduction efforts.