Table 1 Search strategy for selected databases

(("glutamine supplementation "[Mesh] OR "lipid profile"[Mesh] OR"Glucose Homeostasis"[Mesh] OR "Metabolic Syndrome X"[Mesh] OR "cardiometabolic Syndrome "[ Title/Abstract] OR "Insulin Resistance Syndrome"[ Title/Abstract]) OR "Metabolic X Syndrome "[ Title/Abstract] OR "Dysmetabolic Syndrome"[Title/Abstract] OR "Cardiovascular Syndromes, Metabolic"[Title/Abstract] OR "Diabetes Mellitus, Type 2"[Mesh] OR "obesity"[Mesh] OR " abdominal obesity"[Mesh] AND ("Se"[Mesh] OR "se"[Title/Abstract]))

Scopus

(( ( TITLE-ABS-KEY ( Se) OR TITLE-ABS-KEY ( "Se")) AND ( ( TITLE-ABS-KEY ( "Metabolic Syndrome") OR TITLE-ABS-KEY ( cardiometabolic) OR TITLE-ABS-KEY ( " Cardiovascular Syndromes" OR TITLE-ABS-KEY ( "Diabetes Mellitus") OR TITLE-ABS-KEY ( "Type 2 Diabetes") OR TITLE-ABS-KEY ( cardiovascular) OR TITLE-ABS-KEY ( "Syndrome X") OR TITLE-ABS-KEY ( "Insulin Resistance ") OR ( TITLE-ABS-KEY ( "glucose homeostasis") OR TITLE-ABS-KEY ( "Homeostasis of Glucose") OR TITLE-ABS-KEY ( "Lipid profile ") OR TITLE-ABS-KEY ( "lipid panel") OR TITLE-ABS-KEY ( "Lipid_profile") OR TITLE-ABS-KEY ( " glutamine supplementation ")

ISI/WOS

TOPIC: (Se) OR TOPIC: (se)

( TOPIC: ("Metabolic Syndrome ") OR TOPIC: ("Mets ") OR TOPIC: ("Dysmetabolic Syndrome")OR TOPIC: ("Cardiovascular Syndromes") OR TOPIC: ("Insulin Resistance Syndrome ")

OR TOPIC: ("Cardiometabolic")OR TOPIC: ("Diabetes Mellitus ")OR TOPIC: ("Type 2 Diabetes ")OR TOPIC: ("Syndrome X ")OR TOPIC: ("glucose homeostasis ")OR TOPIC: ("Homeostasis of Glucose ")

OR TOPIC: ("Lipid profile ")OR TOPIC: ("lipid panel ")OR TOPIC: ("Lipid_profile ") OR TOPIC: ("Oxidative Stress ") OR TOPIC: ("glutamine supplementation ")

Timespan = All years AND

Indexes = SCI-EXPANDED, SSCI, CPCI-S, CPCI-SSH Timespan = All years