Peanut oil, also known as groundnut oil or arachis oil, is a vegetable oil derived from the seeds of the peanut plant, Arachis hypogaea. It is commonly used in cooking, but its emollient and occlusive properties also make it a valuable ingredient in the cosmetic industry. The oil is characterized by its pale yellow to yellow appearance, a mild odor, and a bland taste. [1]

The production process of peanut oil typically involves several stages, starting with harvesting and cleaning the peanut seeds. The seeds are then shelled, and the kernels are crushed or flaked to increase the surface area for oil extraction. Oil extraction can be carried out through mechanical pressing (expeller pressing) or solvent extraction, using solvents like hexane. [2] After extraction, the crude oil undergoes refining processes that include degumming, neutralization, bleaching, and deodorization to remove impurities, color, and odor, resulting in a refined oil suitable for cosmetic and culinary applications. [3]

In terms of efficacy and function, peanut oil acts primarily as an emollient and occlusive agent in cosmetic formulations. As an emollient, it helps to soften and smooth the skin by filling in the gaps between skin cells, improving the skin's texture. [4] Its occlusive properties create a protective barrier on the skin's surface, preventing moisture loss and protecting the skin from environmental aggressors. [5] Peanut oil is also a source of vitamin E, an antioxidant that can protect the skin from free radical damage. [6]

Peanut oil finds application in a variety of cosmetic products, including lotions, creams, massage oils, and hair care products. In lotions and creams, it contributes to the product's moisturizing and skin-softening effects. Massage oils benefit from its lubricating properties, facilitating smooth application and reducing friction. In hair care, it can add shine and moisturize the hair shaft. However, manufacturers should exercise caution due to potential allergic reactions in individuals with peanut allergies; proper labeling is essential. [7]

For packaging and transportation, peanut oil is typically stored in airtight containers, such as drums or bottles, to prevent oxidation and maintain its quality. The containers should be made of materials that do not react with the oil. During transportation, precautions should be taken to protect the oil from extreme temperatures and direct sunlight, which can degrade its quality and shorten its shelf life. [8] Proper labeling, including the product name, batch number, and storage instructions, is crucial for safe handling and traceability throughout the supply chain.

Citations:
[1] Gunstone, F. D. (2004). Vegetable Oils in Food Technology: Composition, Properties and Uses. Blackwell Publishing._
[2] Segura, R., Milesi, M. M., & Piagentini, A. M. (2015). Vegetable Oil Extraction. In Handbook of Food Chemistry (pp. 1-23). Springer, Berlin, Heidelberg.
[3] Dijkstra, A. J. (2006). Oil Extraction. In Bailey's Industrial Oil and Fat Products, Edible Oil and Fat Products: Chemistry, Properties and Health Effects (pp. 241-314). John Wiley & Sons, Inc._
[4] Lodén, M., & Wessman, W. (2001). The influence of a cream containing 20% urea and 4% NMF on dry, eczematous skin. Skin Research and Technology, 7(1), 42-46._
[5] Goffin, V., Piérard-Franchimont, C., & Piérard, G. E. (2008). Efficacy of skin occlusive agents. _Dermatology, 216(1), 64-67.
[6] Packer, L., Weber, S. U., & Rimbach, G. (2001). Molecular aspects of alpha-tocotrienol mediated _neuroprotection. Journal of Nutrition, 131(2), 369S-373S.
[7] Simons, F. E. R., & Simons, K. J. (2003). Peanut allergy. The Lancet, 361(9367), 1502-1503.
[8] _ Codex Alimentarius Commission. (2019). Codex Standard for Named Vegetable Oils (CODEX STAN 210-1999)._

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