44The Ultimate Guide to Red Light TherapyFor example, one study found that pulsing LED light at40 Hz was optimal for promoting growth and activity inbone-forming cells.49This frequency is also commonlyused in brain light therapy, showing promise in improvingbrain connections and easing Alzheimer‘s symptoms.A recent experiment on nerve-like cells found that pulsinglight 40 times per second was particularly effective inboosting cell metabolism (the process by which yourbody converts food and oxygen into energy).49Pulsing the light at 40 times per second with a 10% dutycycle—meaning the light was on for only 10% of eachcycle—showed significant effects, even though the totalamount of light energy delivered over time was the sameas in other test conditions.49The study used both red (660nm) and near-infrared (850 nm) LED light.40 HzThese findings highlight the potential importance of using a 40 Hz frequency inRLT treatments, as it significantly influenced how cells responded.49If you‘re unsure about which light setting to use on your NovaaLab device, the steady light mode is generally agood starting point. However, you might consider trying the pulsed mode at 40 Hz under two circumstances:Overheating: If your device feels too hot during use, switching to the pulsed mode can help reduce heatbuildup.Desired results: If you‘re not seeing the expected benefits from the steady light, experimenting with the40-Hz pulsed mode might enhance your results. Some studies suggest this setting can optimize healing.3.5 Which is Better: Visible Red Light,Near-infrared, or Both?One key factor in RLT’s effectiveness is how well the light can penetrate into our tissues. Scientists havediscovered that there‘s an „optical window“ in our bodies, ranging from 600 to 1350 nanometers (nm) in thelight spectrum.34In this range, which includes both visible red light as well as infrared, light can penetratedeeper into our tissues because it‘s not easily absorbed or scattered by common body components likeblood, melanin (skin pigment), or water.
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