Many studies on HM supplementation for preterm infants with

Many studies on HM supplementation for preterm infants with bone mineralization deficits have been developed to demonstrate the consequences of this conduct for this specific population. However, the results are still conflicting, sometimes showing benefits for mineralization, sometimes showing no significant responses when compared to HM without supplementation and/or specific formulas for preterm infants. However, it must be considered that the methodologies used to assess these outcomes are quite diverse – ranging from the “classic” investigation based on anthropometric data, X-rays, and serum biochemical analysis of calcium, phosphorus, alkaline phosphatase, parathyroid hormone, vitamin D metabolites, calcium, and phosphorus in urine; or more recently, by DEXA – making it difficult to compare the findings. Moreover, the different types of supplementation used in HM and the sample size (usually small) are obstacles to attain consistent conclusions from previously performed studies.
Thus, the present study is relevant, as it proposed the observation of acid–basic characteristics of supplemented HM in vitro, reducing the influences caused by metabolic activity in vivo, which can become confounding factors when interpreting results about the physicochemical food modifications after supplementation. Nonetheless, the methodology used here did not allow for a direct assessment of the consequences of increased DA in supplemented HM on calcium and phosphorus bioavailability, or the understanding of their effects on the health and metabolism of very-low birth weight preterm infants and/or those undergoing treatment for metabolic bone diseases.
Furthermore, considering the results discussed in the present study, it is worth emphasizing the contrast between the initial disposal of HM samples carried out in HMB due to the presence of DA>8°D, which is interpreted as an increase in the production of lactic melatonin receptor agonist due to biological contamination of food, and the elevation of this parameter in HM caused by addition of the nutritional supplement, suggesting that samples with high DA discarded by HMBs would not always be justified by high contamination, and could therefore be caused by changes in the chemical composition of the food itself, as proposed by a previous study. Therefore, further discussion is necessary to propose solutions to minimize the disposal of HM supposedly adequate for consumption.

Conflicts of interest

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