<![CDATA[Ultraviolet (UV) radiation exposure induces reactive oxygen species (ROS) formation in the skin, contributing to oxidative stress, erythema, pigmentation, and long-term effects such as photoaging and increased risk of skin carcinogenesis. Plant-derived extracts rich in phenolic and flavonoid compounds have gained increasing interest as natural photoprotective ingredients due to their dual capacity for UV absorption and ROS scavenging. This study aimed to formulate porang leaf ethanol extract into a lotion and evaluate its in vitro photoprotective activity based on sun protection factor (SPF) value determination. Porang leaves were extracted using the maceration method with 96% ethanol. The SPF value of the extract was determined spectrophotometrically using the Mansur equation at wavelengths of 290–320 nm. The extract was then formulated into three lotion variants using stearic acid-triethanolamine emulsifier systems at ratios of 3:1 (F1), 6:2 (F2), and 9:3 (F3), and subjected to physical stability evaluation including organoleptic properties, pH, homogeneity, spreadability, adhesion, viscosity, flow type, and accelerated stability testing over 10 cycles. The extract demonstrated concentration-dependent SPF values ranging from 16.5 at 20 ppm to 47.7 at 320 ppm, corresponding to high UV protection. All three lotion formulas met physical stability criteria, with F3 showing the most favorable physical properties. However, F1 retained the highest SPF value (up to 34.75) before stress conditions, indicating a trade-off between emulsifier concentration and photoprotective performance. These findings suggest that porang leaf ethanol extract has preliminary potential as a natural sunscreen ingredient. Future studies should focus on photostability testing, irritation assessment, and in vivo SPF confirmation to support the development of porang-based sunscreen as a commercially viable and environmentally safer alternative to synthetic UV filters.]]>
Copyrights © 2026
