Recently, many studies have revealed the association between environmental stresses and skin disorders. Skin protects the inner body organs as a first line of defence against various environmental detriments. The physical, chemical, biological, and environmental stresses and internal factors, including reactive oxygen species, can lead to skin aging, laxity, wrinkles, dryness, and coarse texture. Therefore, utilizing naturally occurring bioactive phytochemicals has increased in recent years because of advancements in green technology, and new extraction techniques have made their use more compatible, enabling sustainable development. Alga, both macroalgae and microalgae are photosynthetic organisms that are highly exploited in food, feed, pharmaceuticals, nutraceutical, and cosmetic industries. Algae widely synthesize primary and secondary bioactive metabolites such as polysaccharides, vitamins, flavonoids, carotenoids, pigments, phenolic, and mycosporine-like amino acids, etc. Many cosmetic formulations use algal bioactive metabolites or algal cells as a moisturizer, texture-enhancing agents, anti-wrinkle agents, whitening agents, sunscreen, anti‐cellulite, thickening agents, and also for hair care. The current review focuses on a better understanding and recent advancements in the application of algal extract and its biomass in a cosmetic formulation. It also briefly describes the current market scenario, challenges, and future prospectus of algae-based cosmetic products.

最近，许多研究揭示了环境压力与皮肤疾病之间的关联。皮肤保护身体内部器官，作为抵御各种环境危害的第一道防线。物理、化学、生物和环境压力以及包括活性氧在内的内部因素会导致皮肤老化、松弛、皱纹、干燥和质地粗糙。因此，近年来，由于绿色技术的进步，天然生物活性植物化学物质的利用有所增加，而新的提取技术使其使用更加兼容，从而实现可持续发展。藻类（大型藻类和微藻类）都是光合生物，在食品、饲料、药品、营养品和化妆品行业中得到广泛利用。藻类广泛合成初级和次级生物活性代谢物，如多糖、维生素、类黄酮、类胡萝卜素、色素、酚类和类菌孢素氨基酸等。许多化妆品配方使用藻类生物活性代谢物或藻细胞作为保湿剂、质地增强剂、抗皱剂、美白剂、防晒剂、抗脂肪团、增稠剂以及护发剂。本综述的重点是更好地了解藻类提取物及其生物质在化妆品配方中的应用和最新进展。它还简要描述了藻类化妆品的当前市场状况、挑战和未来前景。