Hylocereus undatus Extract, derived from the fruit and peel of the white‑fleshed dragon fruit cactus, is a bioactive botanical ingredient rich in betalains, polyphenols, flavonoids, vitamin C, and polysaccharides. These compounds exhibit strong antioxidant and free‑radical scavenging activity, which is highly relevant in cosmetic formulations targeting oxidative stress, photoaging, and environmental skin damage. Betalains and phenolic acids inhibit lipid peroxidation and reduce reactive oxygen species (ROS), thereby helping preserve collagen integrity and limiting inflammation‑driven degradation of extracellular matrix proteins. In addition, the polysaccharide fraction of Hylocereus undatus contributes to hydration and surface film‑forming properties, improving stratum corneum water retention and supporting skin barrier homeostasis. These mechanisms make the extract suitable for formulations positioned for anti‑aging, brightening, and urban‑defense skincare.

Recent cosmetic‑focused studies indicate that Hylocereus undatus extract can also modulate the skin microbiome and inflammatory signaling pathways, contributing to improved skin comfort, reduced erythema, and more uniform tone. Its phytochemical profile demonstrates mild antimicrobial and soothing activity, which is beneficial in products designed for sensitive, stressed, or acne‑prone skin. While its primary evidence base supports skincare use, the same antioxidant and calming effects extend to scalp and haircare applications, where oxidative stress and inflammation contribute to follicular dysfunction and dryness. In hair formulations, dragon fruit extract can be incorporated into scalp serums, conditioners, and leave‑on treatments to help protect scalp tissue from pollution‑related oxidative damage and enhance overall hair environment quality, though direct hair‑fiber restructuring data remain limited.