Red Light Therapy Side Effects & Misuse Risks
Known concerns, misuse risks and the limits of current long-term safety evidence.
Safety is device-specific
Red light therapy does not use ultraviolet light, but that does not make every device or protocol risk-free. Output, distance, exposure time and eye guidance vary by product.
Independent guidance
Cleveland Clinic says red light therapy appears generally safe when used short-term and as directed, while noting that misuse could damage skin or eyes and that long-term safety is not yet established.
Follow the instructions
Use the manufacturer's current instructions for eye protection, distance, duration and frequency. Do not improvise a higher dose because a session 'feels mild.'
When to get professional advice
If you are treating a medical condition, taking a medication that may increase light sensitivity, have an eye condition, are pregnant, or have another health factor that could alter risk, ask a qualified clinician who knows your history.
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