Methods	Study design: Randomized controlled trial
	Unit of randomization: Individually randomised
	Type of study: Balanced Energy Program
Participants	Location/setting: Health care centres of Ghaemieh and Baghfayz, Iran
	Population: Not specified
	Sample size: 53
	Drop outs/withdrawal: Not specified
	Socio‐demographics
	Mean (SD) age:
	Supplemented: 26.3 (6)
	Control: 25.5 (7)
	Occupation: Not specified
	Race: Not specified
	Education: Not specified
	Family income: Not specified
	Inclusion criteria:
	Healthy pregnant women who were free from systemic and genetic disorders and without a history of stillbirth, premature birth, or low birth weight infants
	Exclusion criteria: Using medication or addicted to illicit drugs were excluded
Interventions	Intervention (sample size):
	Traditional Food Supplementation: The experimental group received traditional food supplementation everyday, supplying an extra 400 kcal and 15 g protein through the Ghaemiah health care centre. Food supplementation which included rice‐milk porridge, lentils, pottage, cheese, yogurt, eggs and milk with bread, was given five days during the week. It was provided from 4th month of pregnancy until childbirth (n = 28)
	Control (sample size): Unsupplemented (n = 25)
	Concomitant interventions: Prenatal care
	Training: Not specified
	Follow‐up:
	Mothers were weighed once a month throughout pregnancy and 24‐h recall was used to estimate food intake. Infants were followed monthly until 4 months of age
Outcomes	Primary outcomes: None
	Secondary outcomes: Birth weight
	Timing of outcome assessment: At birth
Notes	Study start date: Not specified
	Study end date: Not specified
	Time period: Not specified
	Study country: Iran
	Study limitations: Not specified
	Funding source: Not specified
	Conflict of interest: Not specified