Photobiomodulation alters the viability of HUVECs cells.

The aim of the present study was to investigate the influence of low-level red (660 nm) and infrared (780 nm) laser with four different radiance exposures on human umbilical vein endothelial cells (HUVECs) in vitro. HUVECs (1.5 × 10) were incubated in 96-well culture plates.