File:Effect of 670 nm photobiomodulation (PBM) on blood glucose concentration spikes.jpg

English: "Maximum blood glucose concentrations reached were significantly reduced when comparing 670 nm PBM intervention against the placebo intervention. A significant reduction in the maximum blood glucose concentration reached was observed following 670 nm PBM (red bar) when compared with a control result from the same participants (grey bar). There was no difference observed between the maximum oral glucose tolerance test result following placebo intervention when compared with its preceding control from the same participant group (blue bars). *p < 0.05, **p < 0.01, ns, not significant. Error bars are standard error of the mean. "

"This study also investigated the effect of 670 nm PBM on blood glucose spiking. Comparing 670 nm PBM and placebo interventions revealed a reduction of 12.1% in the peak glucose concentration reached, down from 10.8 to 9.5 mmol/L (p = 0.0102; Figure 4). Separately, paired analysis within the 670 nm group gave a 7.5% reduction in maximum glucose peak level, down from 10.3 to 9.5 mmol/L (p = 0.0054), with no significant differences in maximum glucose level reached in the paired placebo group analysis (Figure 4). These changes were obtained with only 15 min of exposure over 800 cm2 tissue area, accounting for ~4% of the skin surface area [25]."

"In the 670 nm PBM group, immediately following initial blood glucose measurement, participants exposed an 800 cm2 region of upper back to 670 nm light for 15 min at an intensity of 40 mW cm−2 (28 800 J). This would illuminate skin cells and underlying musculature including the trapezius [23]. Light was delivered via light emitting diodes (LED); 670 nm peak wavelength with a half power band of ~10 nm (Light Power Health, UK). The LED array was positioned 400 mm from the participants back"