What everyday milk handling changes

A kitchen routine, studied in the laboratory

Bahman and colleagues examined household milk handling at Punjab Biotechnology Incubator in 2010. Their paper appeared in the Indian Journal of Public Health in 2012. They compared untreated standardized milk with samples exposed to boiling, storage, dilution, sugar and condiments.

What the researchers measured

Under the tested boiling procedure, vitamin A and B12 concentrations fell by 21%, B3 by 13%, and B5 by 3%. Several other vitamin readings did not change. The concentrations of most proximate components and minerals increased, which the authors associated with water evaporation.

The method matters

Milk was heated uncovered on a medium burner, cooled, and its surface fat layer removed before analysis. This means heating and subsequent handling both belong to the treatment being measured. A higher nutrient concentration after evaporation does not mean the pot gained nutrients.

Storage is part of the story

The experiment also examined 24-hour storage under different conditions. Removing the separated fat layer affected the measured fat content. These results should not be attributed to reheating alone.

What to take away

Think about the entire routine: milk type, necessary heat treatment, hygienic handling, storage and what is removed before consumption. This small experimental study is not evidence of a clinical health outcome or a test of Damroo. The paper disclosed Nestlé India funding and two coauthors employed by the company.