Bright LED Dairy Cases Speed Off-Flavors In Skim Milk
by Blaine Friedlander, Cornell Chronicle
Posted: 2018-01-31 15:36:20 EST

As grocery stores save energy by changing their dairy cases from fluorescent to LED lighting, Cornell researchers have found that milk – particularly skim or fat-free milk – becomes more susceptible to off-flavors from LED light than from standard fluoresence.

To battle bad taste, dairies and grocery stores should consider moving away from plastic packaging that allows light infiltration, the food scientists report in the Journal of Dairy Science, January 2018.

Light-emitting diode (LED) lighting was always assumed to be less damaging to milk due to its lower power consumption, said Robin Dando, assistant professor of food science and a co-author on the research. That assumption seems to be wrong.

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