Data collection/recruitment
Sampling was done continuously over a period of 7 months from January to August 2021. After describing the study and its objectives, written informed consent was obtained from participants who met the study entry criteria and agreed to participate.Confirmed participants were allocated to three groups (1) intervention; (2) placebo and (3) control using block randomization via the website The volume of human milk was recorded as one of the main results of the study by the participants in the daily information recorder form. The weight of the infants was also measured and recorded by one of the neonatal intensive care unit staff, who was responsible for weighing the infants. Statistical analysis was performed by a statistician who was not aware of the content presented for the studied groups and their allocation.