Natural Antioxidants and Human Health Effects

Total phenolic content in ripe date fruits (Phoenix dactylifera L.): A systematic review and meta-analysis

Ripe date fruits contain phenolic compounds which possess a high antioxidant activity. The current review was carried out to evaluate total phenolic content in ripe date fruits. Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) was followed during the review process. Relevant studies published from inception up to March 2019 were retrieved from three databases. Study selection was performed based on specific inclusion criteria. A total of twenty-two articles were selected and included in the present review. Data collected from these studies were organized, pooled, and analyzed using descriptive statistics. Total phenolic content means and medians have been reported for the collected ripe date fruit samples for each included study and pooled data. The results suggested that ripe date fruits contain a potent total phenolic content that can contribute mainly to their antioxidant properties.

Antioxidant Content Determination in Ripe Date Fruits (Phoenix dactylifera L.): a Scoping Review

Ripe date fruits are a rich source of antioxidants. The current scoping review was conducted to identify various characteristics of studies that were carried out to determine antioxidant content in ripe date fruits. The framework established by Arksey and O’Malley was adopted to conduct this scoping review. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews (PRISMA-ScR) was used as a guide during the review process. Relevant studies published in March 2019 or any time before were retrieved from three databases. Study selection was performed based on specific inclusion criteria. The extracted data from selected studies were organized in a charting table, and then analyzed using descriptive statistics. A sum of thirty-one articles were selected and included in the present scoping review. Various characteristics of the selected studies, collected ripe date fruit samples, and extraction solvents, as well as information about determining antioxidant content and the used analytical methods, citation references for procedures, measurement units, and data presentation methods, have been identified and discussed carefully. High inconsistency and variability were observed among the selected studies. The research gaps and future recommendations to promote higher research design consistency and improve research quality in this area of research have been described.