I bought this product due to an inflamed knee and broken ribs. Studies show most benefits occur at the wavelengths of 600 to 700 nm for red and 780 to 1100 nm for near-infrared light for tissue regeneration, improved circulation, ATP production, and decreasing inflammation. This product's red light wavelengths are 660nm (deep red) and 808nm (infrared), so this is in line with the medically effective wavelengths. What I can tell so far: If I use it a bit longer (around 30 min) on my ribs, pain/sensitivity is dramatically reduced. This could be a sign of reduced inflammation. Subjectively speaking, I do feel like the daily sessions are helping to accelerate healing in my ribs. I'm not sure it helps with bone regeneration (osteoblast production etc.) but science does show increased blood flow, lower inflammation, and better joint, muscle, and cartilage regeneration. I could imagine you need to have a lower body fat percentage in order to effectively target and reach deep tissue like ribs and intercostal structures so as long as your body fat percentage is lower than 20–30 %, I think you shouldn't have any issues (this is my bro-science-based opinion). On joints like shoulders, hips, knees, ankles, elbows, and wrists, this should never be a problem, as fat doesn't accumulate here very well. When using it on my knee, I feel like pain and inflammation are reduced as well. So far, I can strongly recommend this device and I will contiue to use it for any other sports-related injuries.