Table 1.

Search strategy in databases.

Databases	Search Strategy	Limits	Filters
Web of Science	ALL = (beetroot juice and supplementation); ALL = (beetroot juice and performance); ALL = (beetroot juice and caffeine); ALL = (beetroot juice and coffee); ALL = (beetroot juice and creatine); ALL = (beetroot juice and beta-alanine); ALL = (beetroot juice and citrulline); ALL = (beetroot juice and protein); ALL = (beetroot juice and amino acid); ALL = (beetroot juice and carbohydrates)	Title Article English	563 filtered elements
PubMed	(Beetroot juice) AND (supplementation); (Beetroot juice) AND (performance); (Beetroot juice) AND (caffeine); (Beetroot juice) AND (coffee); (Beetroot juice) AND (creatine); (Beetroot juice) AND (beta-alanine); (Beetroot juice) AND (citrulline); (Beetroot juice) AND (protein); (Beetroot juice) AND (amino acid); (Beetroot juice) AND (carbohydrates);	Title Article English Age	137 filtered elements