Characterization and Stability of a Formulation Containing Antioxidants-Enriched Castanea sativa Shells Extract

Abstract

The cosmetic industry is a field on rise where the search for novel antioxidant ingredients, preferably from natural matrixes, became a new challenge. The reuse of Castanea sativa shells as a source of phytochemicals with pro-healthy effects in skin care products may be a valuable alternative to valorize this underexploited agro-industrial by-product. A previous study of our research group demonstrated the antioxidant properties of chestnut shells extract obtained by ultrasound-assisted extraction (UAE), as well as its safeness on skin cell lines, namely keratinocytes and fibroblasts. Based on the extract richness in antioxidants, a formulation containing C. sativa shells extract obtained by this environmentally friendly technology was successfully developed in the present study. The oil-in-water (O/W) cream incorporating the chestnut shells extract was further characterized regarding organoleptic and technological properties, namely color, pH, droplets size, and viscosity. A stability study over time was also accomplished. The results demonstrate that the formulation not only displayed pleasant organoleptic characteristics attractive to consumers but also a pH compatible with skin and a suitable viscosity for topical application. The stability study revealed minor changes to droplet size and color, without affecting the general stability of the formulation. In conclusion, this study emphasized the prominent benefits of chestnut shells extract as a novel ingredient for skin care formulations.

Stability and Antioxidant Activity of Hydro-Glyceric Extracts Obtained from Different Grape Seed Varieties Incorporated in Cosmetic Creams

“…The pH and viscosity of the creams were also measured at scheduled times, storing the samples at 4, 25, and 50 °C. The changes in these parameters are predictive of the samples’ stability as well [ 51 ]. Viscosity is the measure of the ability of formulations to resist deformation or, inversely, the measure of their capability of flowing as a function of the sheer stress and the temperature applied.…”

Exploring the Properties of Micronized Natural Zeolitic Volcanic Tuff as Cosmetic Ingredient

“…The pH of the prepared cosmetic formulations containing MZ of different particle sizes ranged from 4.2 to 4.4. The pH of the skin ranges from 4 to 6 [ 18 ]. A slight increase in pH with the decrease in MZ particle size was observed, namely the pH of MZ S1 5% 20–43 µm was 4.4, while the pH of MZ S1 5% 250–500 µm was 4.2.…”

“…European Regulation No. 1223/2009 [ 17 ] establishes the requirements for cosmetic products available on the market and the restrictions for certain substances, which can cause adverse health effects to ensure the protection of the human health [ 18 ].…”

Uji stabilitas fisik serum anti-aging ekstrak etil asetat daun cempedak (Arthocarpus champeden Spreng.)

“…Europe The Personal Care Association melaporkan bahwa ada sekitar 450 juta jiwa masyarakat Eropa yang setiap hari menggunakan berbagai macam kosmetik. 1 Selain itu berdasarkan penelitian Hayen dan Nurchayati (2020), masyarakat saat ini sadar bahwa tampil menarik itu penting sehingga perilaku untuk menggunakan variasi produk kosmetik dalam menunjang penampilan sudah menjadi life style. 2 Berdasarkan data tahun 2019, diketahui bahwa permintaan pasar terkait produk kosmetik di Indonesia mencapai US$ 6.03 miliar dan diprediksi akan meningkat menjadi US$ 8,46 miliar pada tahun 2022.…”

“…Hal tersebut, dikarenakan tersedianya sumber aneka hayati yang berlimpah di Indonesia, selain itu produk bahan alam juga dianggap lebih sehat dan kurang efek samping bila dibandingkan dengan kosmetik bahan aktif sintetik. 1,3 Produk kosmetik anti-aging adalah salah satu produk yang paling banyak dicari oleh masyarakat. Kemampuannya dalam melawan tanda-tanda penuaan kulit yang disebabkan oleh kumulatif faktor intrinsik, (genetik, gangguan hormonal dan kekurangan vitamin) dan faktor ekstrinsik (radiasi ultraviolet, polusi lingkungan dan perawatan kulit yang tidak tepat).…”