Table 1.

Database search indicator.

Articles screening strategy	KEYWORDS: A: “natural”; B: “antioxidant”; C: “oral”; D: “health”; E: “disease”
	Boolean Indicators: (“A” AND “B”) AND ((“C” AND “D”) OR (“C” AND “E”))
	Timespan: from January 2018 up to 30 April 2023.
	Electronic Databases: PubMed, Web of Science, Scopus, and Cochrane Library