Review article	Target population	Intervention reviewed	HIC or LIC	Last search date	Primary outcomes	Secondary outcomes	No. of studies	Sub group analysis	Quality assessment	Meta‐analysis MD (95% CI)
Salam Rehana et al. (2016)	Adolescents (11–19 years) and Youth (15–24 years)	Micronutrient supplementation	Global	December 2014	Outcomes were not prespecified so all the outcomes reported by the study authors were included	Outcomes were not prespecified	31	School setting	Cochrane risk of bias assessment tool	Impact of Iron‐folic acid supplementation on anaemia RR = 0.69(0.62, 0.76)
Salam Rehana et al. (2016)	Pregnant Adolescents	Micronutrient supplementation	Global	December 2014	Outcomes were not prespecified so all the outcomes reported by the study authors were included	Outcomes were not prespecified	16	Not mentioned	Cochrane risk of bias assessment tool	Impact of nutrition interventions on
		Nutritional education								Mean birth weight SMD = 0.25(0.08,0.41)
										Low birth weight RR = 0.70(0.57, 0.84)
Lassi Zohra et al. (2017)	Adolescents (10–19 years) and Women of reproductive age	Micronutrient supplementation	Global	October 2016	Mortality, pregnancy outcomes, morbidity, nutritional, anthropometrics		107	Family based interventions	GRADE Working Group grades of evidence	Iron supplementation vs. placebo:
		Food/protein energy supplementation
		Nutrition education for pregnant adolescents								Hemoglobin concentration (g/L) in adolescents: SMD = 1.83(0.59, 3.08)
		Obesity prevention								IFA supplementation vs. placebo:
										Hemoglobin (g/L) in adolescents: MD = 2.24(0.36, 4.12)
		Management of gestational diabetes								Vitamin D supplementation vs. placebo
										25(OH)D (nmol/L) concentration in adolescents: MD = 8.80(−2.68, 20.28)
										Zinc supplementation vs. placebo:
										Hemoglobin (g/L) concentration in adolescents: SMD = 4.81(0.97, 8.66)
										Serum zinc (mol/L) in adolescents: SMD = 4.28(2.49, 6.06)
										Preterm birth in pregnant adolescents: RR = 0.57(0.46, 0.69)
										Low birth weight in pregnant adolescents: RR = 0.39(0.15, 0.98)
										Iodine supplementation vs. placebo:
										TSH (U/dL) concentration in adolescents:.SMD = 0.25(−0.02, 0.52)
										Interventions for prevention of obesity in pregnant adolescent: birth weight: SMD = −0.05(−0.11, 0.01)
										Interventions for management of obesity in adolescents: BMI:
										SMD = −0.24(−0.36, −0.13)
Hoyland, Dye and Lawton (2009)	Children or adolescent (aged 18 years)	Any type of breakfast manipulation	Global	January 2009	Outcome measures of cognitive performance		45	Not mentioned	JADAD criteria used	Not performed
Meiklejohn, Ryan and Palermo (2016)	Adolescents aged 18 years	Nutrition education was delivered in conjunction with complementary strategies	High and Middle Income Countries	September 2014	Anthropometric measures, biochemical markers, dietary consumption data, changes in dietary intake of fruits and vegetables, snack foods, fat, sucrose, sugar‐sweetened beverages and soft drinks		13	Not mentioned	American Dietetics Association. ADA	Not performed
									Evidence Analysis Manual, IV ed
Das et al. (2013)	Children and adolescent till age of 18 years and women of reproductive age	Fortification	Global	November 2012	Serum micronutrient levels, hematologic markers, anthropometric indicators, pregnancy outcomes, morbidity outcomes, mortality		201	Age groupsCountries	GRADE Working Group grades of evidence	Results for iron fortification in children
										Hemoglobin levels: SMD = 0.55 (0.34, 0.76)
								Population characteristics		Effect on anaemia: RR = 0.55 (0.42, 0.72)
								Type of food fortified		Results for zinc fortification in children
								Duration of intervention		Serum zinc levels: SMD = 1.28 (0.56, 2.01)
										Hemoglobin level: SMD = −0.11(−0.52, 0.31)
										Copper Levels: SMD = 0.57 (−0.91, 2.06)
										Serum alkaline phosphatase levels: SMD = 0.94(−0.29, 2.17)
										Weight gain: SMD = 0.50(−0.12, 1.11)
										Height growth: SMD = 0.52 (0.01, 1.04)
										Calcium and vitamin D fortification
										Serum parathyroid hormone levels:SMD = −0.40 (−0.56,−0.24)
										Serum vitamin D levels: SMD = 1.23 (0.35,2.11)
										Serum calcium levels:SMD = −0.40 (−0.59,−0.20)
										Results for multiple micronutrient fortification in children
										Hemoglobin levels: SMD = 0.75(0.41, 1.08)
										Effect on anaemia: RR: 0.55 (0.42, 0.71)
										Effect on vitamin A deficiency: RR = 0.90 (0.76, 1.06)
										Height‐for age Z‐score: SMD: 0.13(−0.04, 0.29)
										Weight‐for age Z‐score: SMD: −0.12(−0.43, 0.20)
										Weight‐for height Zscore:SMD: −0.11(−0.40, 0.17)
										Results for iron, folate and calcium/vitamin D fortification in women
										Hemoglobin levels: SMD: 0.62 (0.36,0.89)
										Effect on anaemia: RR: 0.68 (0.49, 0.93)
Marquez, Racey, Preyde, Hendrie and Newton (2015)	Adolescents aged 12 to 18 years	Interventions targeting an increase in dairy food or Calcium intake	Global	February 2015	Intakes of calcium, milk and dairy per day		16	Not mentioned	The Quality	Not performed
									Assessment Tool for Quantitative Studies
									by EPHPP
Samuelson 2017	Adolescents aged 10–19 years	Diet and nutrition interventions	Global	January 2016	Depression		11	Not mentioned	Not mentioned	Not performed
Lohner et al. (2012)	Children and adolescents	Folate supplementation	Global	March 2009	Serum folate content, erythrocyte folate content		26	Not mentioned	Not mentioned	Not performed