The blue light of a smartphone screen changes the chemical composition of cells.

Blue light from gadget screens affects the main functions of cells and can accelerate aging. American scientists came to such conclusions during experiments with fruit flies - the chemicals in their cells are similar to human ones. Blue light activated "stress-protection genes" in the flies. After that, the levels of some metabolites seriously changed. For example, the levels of succinate increased sharply and the concentration of glutamate decreased. These substances are needed for the proper functioning of cells and the communication of neurons, so changes can cause premature aging and death. Scientists are still planning to confirm their results with experiments with human cells, but they already recommend spending less time in front of screens.