Analytical optimization of a phenolic-rich herbal extract and supplementation in fermented milk containing sweet potato pulp

Lorena Rodrigues Ramos, Jânio Sousa Santos, Heitor Daguer, Andressa Camargo Valese, Adriano Gomes Cruz, Daniel Granato

Research output: Contribution to journalArticlepeer-review

Abstract

The aims of the present study were to optimize and characterize the phenolic composition of a herbal extract composed of green mate (Ilex paraguariensis), clove (Syzygium aromaticum), and lemongrass (Cymbopogon citratus) and to propose the addition of this polyphenol-rich extract to fermented milks (FM) with/without sweet potato pulp (Ipomoea batatas). Proximate composition, pH, acidity, instrumental texture profile, total phenolic content (TPC), antioxidant activity (AA) of all formulations were measured, and sensory attributes were also investigated. The addition of a lyophilized extract (1 g 100 g−1) containing 87.5% clove and 12.5% green mate increased the AA and TPC, while FM with added sweet potato pulp had the best sensory acceptance. The TPC and total reducing capacity had a slight change during 21 days of storage. The data showed that herbal extracts and sweet potato pulp may be used to develop new dairy foods with potential functional properties.

Original languageEnglish
Pages (from-to)950-958
Number of pages9
JournalFood Chemistry
Volume221
DOIs
Publication statusPublished - 15 Apr 2017
Externally publishedYes

Keywords

  • Dairy products
  • Functional foods
  • Ilex paraguariensis
  • LC-ESI-MS/MS
  • Phenolic acids
  • Response surface methodology
  • Syzygium aromaticum

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