Formulation and Factorial Optimization of a Sulfate Free Polyherbal Anti Dandruff Shampoo Employing Plant Derived Saponins

Abstract

Conventional anti‑dandruff shampoos are predominantly based on anionic sulfates such as sodium lauryl sulfate, which provide strong detergency and foam but can disrupt the scalp barrier, increase transepidermal water loss and aggravate irritation during long‑term use. In contrast, consumer demand is shifting toward herbal, sulfate‑free products that offer milder cleansing and improved biocompatibility without compromising performance. In response to this need, the present investigation proposes a sulfate‑free polyherbal anti‑dandruff shampoo in which plant‑derived saponins from Sapindus mukorossi (Reetha) and Acacia concinna (Shikakai) function as true biosurfactants, providing cleansing and foaming while helping maintain scalp pH. The formulation further integrates tea tree oil, neem and tulsi extracts as antifungal and anti‑inflammatory agents, and uses xanthan–guar gum as a natural rheology system to achieve acceptable viscosity, shear‑thinning behaviour and conditioning feel. A structured formulation strategy employing factorial design will be used to optimize the ratio of saponins and gums, followed by comprehensive evaluation including pH, viscosity, surface tension, foam characteristics, cleansing efficiency, protein denaturation, and comparison with a marketed sulfate‑based shampoo. Accelerated stability studies at elevated temperature and humidity will assess physical and functional robustness.

Keywords: Sulfate‑free polyherbal anti‑dandruff shampoo; Sapindus mukorossi; Acacia concinna; Tea tree oil; Neem; Tulsi; Plant saponins; Biosurfactant‑based cleansing; Xanthan–guar gum; Malassezia dandruff.