Rice Water: A Traditional Ingredient with Anti-Aging Efficacy

Authors: Joana Marto, Ângela Neves, Lídia Maria Gonçalves, Pedro Pinto, Cristina Almeida and Sandra Simões

Journal Title: Cosmetics

ISSN: 2079-9284 (Online)

Publisher: MDPI AG

The skin healing benefits of rice have been known for centuries. Rice (Oryza sativa) water is a food processing waste that can potentially be incorporated into cosmetic formulations. However, no scientific evidence supports their role in skincare products. The aim of this project is to design and develop a topical gel formulation containing rice water and to evaluate its biological properties, namely, the anti-aging and antioxidant rice water properties. Rice water was evaluated in terms of physico-chemical composition and in terms of in vitro biological antioxidant activity and elastase inhibitory effect. Rice water was incorporated into a hydrogel and the developed formulation was subjected to pharmacotechnical tests such as pH and viscosity. Biological and sensory effects were evaluated on a panel of 12 volunteers for 28 days. The safety evaluation study was performed on rice water gel, using the Human Repeat Insult Patch test protocol. Rice water presented in vitro biological antioxidant activity and elastase inhibitory effect. The gel formulation containing 96% rice water was biocompatible with the human skin and presented suitable cosmetic properties. Rice water should be thus considered as an anti-aging ingredient to be used as raw material for skincare applications.

Illustration Photo: Rice field (CC0 Creative Commons from Pixabay.com)

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