AI Article Synopsis

  • - Grape marc, a by-product from winemaking, contains beneficial compounds that can be extracted and used to create sun protection creams, specifically using polyphenolic extracts from different grape varieties like Merlot and others.
  • - The best extraction method was found to be 70% ethanol in water, with Merlot extracts showing the highest sun protection factor (SPF) of 7.83 ± 0.76.
  • - When formulating the sunscreens, the cream made from the aqueous extract of Merlot achieved an SPF of 14.07 ± 1.50, demonstrating better stability compared to creams made from ethanolic extracts.

Article Abstract

Grape marc is a by-product resulting from the winemaking industry that still contains beneficial compounds that can be valorized. Thus, we report here the possibility of using polyphenolic extracts of grape marc origin to obtain sun protection creams. The extractions were performed in ethanol and acetone solutions using pomace from different grape varieties (Merlot, Bläufrankisch, Fetească Neagră, Isabella) as a raw material. The obtained extracts were analyzed in order to determine the total phenolic content, the antioxidant activity, and the sun protection factor (SPF) via Mansur spectrophotometric assay. The best results were achieved using 70% ethanol in water as a solvent. The extracts with the highest potential photoprotective effects are from the Merlot variety (SPF = 7.83 ± 0.76). The sunscreens were prepared using the 70% ethanolic extract of the Merlot variety evaporated to dryness, redissolved in either distilled water or ethanol. The SPF estimated in vitro via the COLIPA method showed values of 14.07 ± 1.50 and 11.46 ± 1.32 for the aqueous and ethanolic extracts, respectively, when working with a cream to polyphenolic extract a ratio of 1/1 (/). At the same time, the use of aqueous polyphenolic extracts ensures the better stability of creams compared with the ethanolic ones.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11206142PMC
http://dx.doi.org/10.3390/molecules29122775DOI Listing

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