The good news is that red light therapy does start helping your body from the very first session, but continued therapy helps achieve more lasting results. You may feel minor results immediately, but the best results are achieved over 1-2 months.
From the brand
Product description

Bestqool Red Light Therapy
Benefits of red and near infrared light therapy device
Bestqool Red Light Therapy Panels: Real Testing Results
Frequently Asked Questions
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How quickly does a red light therapy device work?
How does red light therapy reduce inflammation?
Red light therapy alleviates chronic inflammation by increasing blood flow to the damaged tissues, and it's been found in numerous clinical trials to increase the body's antioxidant defenses.
What kinds of models does the light therapy have?
Steady-on mode and pulsing mode. Turn on the device, then press the power on/off button again for pulsing mode.
How often should I do red light therapy?
Many patients wonder how often they should use a red light therapy. Some people require frequent sessions, while others can get by with a therapeuticnow and then. Most get good results with a 15-minute session, 3-5 times each week for several months.
Can I overdo red and near infrared light therapy?
Red light therapy is generally considered harmless, and there are no set rules on how much light to use. Too much light may decrease the therapeutic results, but too little might not work as well.