Formulation, Development, and Evaluation of a Novel Long-Lasting Herbal Deodorant Roll-On Using Layered Fragrance Technology

Abstract

Body odor (bromhidrosis) represents an unpleasant cutaneous phenomenon arising from the microbially-mediated biotransformation of naturally odorless apocrine and eccrine sweat gland secretions. While modern consumer preferences increasingly lean toward botanical alternatives due to concerns regarding dermal irritation, chemical toxicity, and cumulative system effects of synthetic aluminum salts and paraben preservatives, formulating highly effective, long-lasting herbal deodorants remains an industrial challenge. This research paper describes the systematic design, development, optimization, and comprehensive evaluation of a premium natural roll-on herbal deodorant (100 g formulation) utilizing specialized botanical phyto-actives—primarily Aloe vera gel (20% w/w), Neem (Azadirachta indica) extract (10% w/w), and Rose water (15% w/w)—stabilized within an organic lipid matrix of Coconut oil (10% w/w) and Beeswax (8% w/w).

To enhance sensory longevity and continuous performance, an advanced Layered Fragrance System was engineered, structuralizing top notes (Citrus oil and Mint extract) for an instantaneous baseline freshness, middle notes (Lavender oil and Neem accord) as the fundamental herbal identity, and base notes (Sandalwood oil and White musk accord) to facilitate structuralized aromatic fixation. Organoleptic assessments showed excellent physical homogeneity, a premium light-green to off-white aesthetic presentation, smooth non-greasy spreadability, and an ideal topical pH range of 5.5 to 6.2 matching the physiological acid mantle. In vitro antimicrobial challenge evaluations revealed pronounced zones of inhibition against standard dermal microflora, driven by the synergistic action of Azadirachta indica bio-actives. Accelerated stability profiles under varying thermal regimens (refrigerated, ambient, and 48°C) demonstrated structural integrity with zero phase separation, validating its clinical safety and scalable market readiness as a modern therapeutic eco-cosmetic solution.

Keywords: Herbal Cosmetics, Azadirachta indica, Bromhidrosis, Layered Fragrance Technology, Microencapsulation, Skin Compatibility, Formulation Engineering.