Abstract Lavender essential oil (LEO) is widely used in cosmetic and dermatologic contexts, yet its role in hair loss disorders is often overstated relative to the clinical evidence. This review summarizes human, animal, and mechanistic data on LEO and hair outcomes, with emphasis on alopecia areata (AA), androgenetic alopecia (AGA; “male/female pattern baldness”), and overall…

Keywords: tea tree oil, Melaleuca alternifolia, androgenetic alopecia, male pattern baldness, Demodex, scalp inflammation, dandruff, seborrheic dermatitis Abstract Melaleuca alternifolia (tea tree) leaf oil (TTO) is a steam-distilled essential oil widely used in dermatology-oriented products due to its antimicrobial and anti-inflammatory bioactivity, largely attributed to terpinen-4-ol and related terpenes.3,4 Interest in TTO for hair loss…

Keywords: Rosmarinus officinalis, rosemary leaf oil, rosemary leaf oleoresin, rosemary extract, carnosic acid, carnosol, rosmarinic acid, androgenetic alopecia, scalp inflammation Abstract “Rosemary” can mean very different ingredients in topical hair products. Rosmarinus officinalis (rosemary) leaf oil is an essential oil dominated by volatile monoterpenes (e.g., 1,8-cineole, α-pinene, camphor), whereas rosemary leaf oleoresin (often labeled as…

Keywords: Rosmarinus officinalis, rosemary leaf oil, androgenetic alopecia, male pattern baldness, scalp inflammation, seborrheic dermatitis, essential oils, 5α-reductase, minoxidil Abstract Hair loss—particularly androgenetic alopecia (AGA, “male pattern baldness”)—is driven by androgen signaling (notably dihydrotestosterone, DHT), follicular miniaturization, and a variable contribution from perifollicular inflammation and scalp microbiome changes. Rosemary (Rosmarinus officinalis) leaf oil is widely…

Keywords: Cucurbita pepo, pumpkin seed oil, androgenetic alopecia, male pattern baldness, female pattern hair loss, dihydrotestosterone, 5α-reductase, phytosterols Abstract Androgenetic alopecia (AGA)—commonly called male pattern baldness (MPHL) and female pattern hair loss (FPHL)—is driven by genetic susceptibility and androgen signaling, especially dihydrotestosterone (DHT). Pumpkin seed oil (PSO) from Cucurbita pepo has attracted interest as a…

Abstract Pattern hair loss (androgenetic alopecia, AGA)—including male pattern baldness—is driven largely by androgen signaling (notably dihydrotestosterone, DHT) in genetically susceptible follicles. Fruit extracts of Serenoa repens (syn. Serenoa serrulata, “saw palmetto”) contain lipidosterolic fractions (fatty acids + phytosterols) that can inhibit 5α-reductase (types I and II) and may modestly reduce DHT-related follicular miniaturization. This…