Is it possible to obtain nanodispersions with jaboticaba peel's extract using low energy methods and absence of any high cost equipment?

Jaboticaba (Myrciaria cauliflora) is considered a "super fruit" due to its remarkable phenolic content and antioxidant capacity. Despite the great potential of its peels, to our knowledge the investigation of novel nanostructured systems with this natural raw material, still considered an industrial residue, is scarce. The present study aimed to obtain nanodispersions with its peel's extract through a low energy method. Antioxidant assays were performed, showing positive results for DPPH (IC50 = 0.89 µg/mL) and FRAP (225.53 µmol equivalent ferrous sulphate/g). The chemical characterization in terms of flavonoids (2.56%) and total monomeric anthocyanins (0.80%) contents were also performed. Overall, the nanodispersion prepared with the non-ionic surfactant polysorbate 85 and the hydroalcoholic extract standardized in ellagic acid (129 µg/mL) presented the best properties regarding particle size distribution and zeta potential. Thus, it opens perspectives for the generation of novel food-grade nanodispersions through an ecofriendly approach that is in accordance to sustainable concepts.

Extract from byproduct Psidium guajava standardized in ellagic acid: additivation of the in vitro photoprotective efficacy of a cosmetic formulation

ABSTRACT The fruits of guava, Psidium guajava L., Myrtaceae, are cultivated as food and used in agroindustries, generating byproducts or waste that represent environmental problems and require adequate destination. However, these byproducts present high levels of secondary metabolites and have been awakened interest regarding to its reusing. The extract was standardized in ellagic acid concentration by high performance liquid chromatography. The additivation capacity in the in vitro photoprotective efficacy of guava byproduct extract standardized in ellagic acid was verified as a result of its incorporation in cosmetic formulations, comparing it with a standard product. The extract presented synergy with the chemical UV filter (ethylhexyl methoxycinnamate), enhancing the solar protection factor of the phytocosmetic in 17.99%. Besides that, it was possible to show its antioxidant activity and the presence of secondary metabolites such as phenols and flavonoids. According to the results, it is possible to claim that the extract from the guava's agroindustrial byproducts present potential to be studied and reused, applying on the development of innovative products intended to the photoprotection care.