Methods	Study design: Randomized controlled trial
	Unit of randomization: Individually randomized
	Type of study: Food Program
Participants	Location/setting: Maternal Child Health (MCH) centre, Rajchaburi (100 km from Bangkok),Thailand
	Population: Not specified
	Sample size: 43
	Drop outs/withdrawal: None
	Socio‐demographics
	Mean (SD) age:
	Intervention groups:
	I: 22.4 (3.0),
	II: 25.0 (4.8)
	III: 23.4 (4.5).
	Age range: 16‐30 years
	Occupation: Not specified
	Race: Not specified
	Education: Not specified
	Family income: Not specified
	Inclusion criteria: All nonsmoking women, who ranged in age from 16 to 30 year who attended the MCH centre (local hospital)
	Exclusion criteria: Not specified
Interventions	Intervention (sample size):
	Supplemented groups (I and II):
	Group I: received a mix of soybean, mungbean, sesame and sugar coming to, on average, 384 kcal energy, 9.1 g fat and 15 g protein
	Group II: received a mix of rice, dried shrimp, groundnut, sugar and oil coming to, on average, 348 kcal energy, 15.6 g fat and 13.1 g protein
	The supplement was instructed to be consumed as an additional snack and was initiated from the 28th (±2) week of gestation and stopped at birth
	Control (sample size):
	Nonsupplemented group (III):
	Group III: Did not receive any supplementation
	Concomitant interventions:
	Each participant's blood haematocrit was determined before delivery
	Training: Not specified
	Follow‐up:
	Subjects visited the MCH centre every 2 weeks until delivery. These visits consisted of General physical and obstetric examination, anthropometric measurement, 24‐h dietary recall and acceptability and consumption patterns of supplementary formula
Outcomes	Primary outcomes: None
	Secondary outcomes:
	Birth weight
	Birth length
	Head circumference
	Timing of outcome assessment: Every newborn was weighed without clothes within 30 min after delivery
Notes	Study start date: Not specified
	Study end date: Not specified
	Time period: Not specified
	Study country: Thailand
	Study limitations: Not specified
	Funding source: The project funded by the research committee of the Faculty of Medicine, Ramathibodi Hospital, Mahidol University
	Conflict of interest: Not specified