Ray Peat said:Rats had a bright red laser beam shined on their heads for 15 minutes and then the respiratory enzymes of the Krebs cycle was studied. The changes were consistent with enhanced respiration. (A.T. Pikulev, et al., Radiobiology 24(1):29-34, 1984).
Enzyme activity of glutamic acid metabolism and the Krebs cycle in the brain of rats laser-irradiated against a background of altered adrenoreceptor function.
http://www.ncbi.nlm.nih.gov/pubmed/6143345
Abstract
In the in vivo experiments it was demonstrated that the effect of a helium-neon laser (lambda = 632.8 nm), at the background of altered functional status of adrenoreceptors, changes the activity of some enzymes of the glutamic acid metabolism and the Krebs cycle. This may be attributed to both the direct effect of laser radiation and the indirect effect via the adrenergic system.