What is the downside of red light therapy?

Red light therapy's main downsides are the time commitment required for visible results, the risk of eye strain from improper use, and the reality that most consumer devices are not FDA-cleared for the specific claims printed on their packaging.

Red light therapy at 630nm stimulates collagen production gradually — meaningful skin improvements typically require 3–5 sessions per week sustained over 8 or more weeks. Skipping sessions stalls progress, making consistency the biggest practical barrier. Eye exposure to concentrated LED output without proper shielding can also cause temporary discomfort or strain, which is why FDA-cleared devices like CUEME's RB-008GB include contoured eye shields as a functional safety feature, not just an aesthetic one.

• Minimum effective protocol for red light therapy: 3–5 sessions per week for 8+ consecutive weeks.
• Recommended session length for red light therapy at 630nm: 5–10 minutes per session.
• Most consumer LED masks carry FDA registration, not FDA clearance — a meaningful regulatory distinction affecting which therapeutic claims are verified.
• Red light therapy at 630nm addresses wrinkles and skin tone; it is not cleared for hyperpigmentation, rosacea, or scarring.
• Eye shields are required during red light therapy sessions to prevent discomfort from sustained direct LED exposure.