Great question. Most people feel at least some difference in energy and a nice “glow” to their skin right away. 8 weeks of daily use is the rule of thumb to see more dramatic effects. Why 8 weeks? This is the length of most skin benefit studies. For other uses like muscle soreness and joints some feel a difference right away and for others it can take up to 8 hrs after use to feel the full effects. Beyond that for the more systemic whole body health benefits (like muscle growth during strength training) it can take several weeks of using once per day in order to feel a difference. For best results we recommend treating for 5 days, then taking 2 days off, then repeating this cycle.
Remember the way it works is by helping your cells do their job better, so it's still up to your cells to do the work once they've gotten the boost from the red light. So if you want to boost results, eat well, stay hydrated, and make sure to relieve stress as much as possible.