Hair care is a critical aspect of personal grooming, and the demand for natural and herbal hair care products has considerably increased due to consumer preference for formulations with minimal side effects. This study focuses on the development and evaluation of a phytoextract-based hair serum incorporating extracts of Oryza sativa (rice) and Psidium guajava (guava) leaves, which are traditionally recognized for their beneficial properties in promoting hair health. The objective is to develop a safe, effective, and natural hair serum to improve hair quality, reduce hair fall, and enhance scalp nourishment. Oryza sativa contains essential bioactive compounds such as amino acids, antioxidants (including ferulic acid), vitamins (such as Vitamin E), and minerals known to strengthen hair follicles, promote hair growth, and add shine and smoothness. Psidium guajava leaves are rich in flavonoids, tannins, and essential vitamins including Vitamin C, which possess antimicrobial, antioxidant, and anti-inflammatory properties that help reduce dandruff, stimulate hair growth, and improve overall scalp health. Three formulation batches were prepared, evaluated for phytochemical content, organoleptic properties, pH, viscosity, and microbial stability.