Bright light therapy utilizes a high-intensity lamp (typically 10,000 lux) to mimic natural sunlight, which helps regulate the body's internal clock. Exposure, particularly in the morning, suppresses melatonin production and can increase serotonin, thereby entraining the circadian rhythm. For healthspan, this translates to improved sleep quality, mood stabilization, and enhanced daytime energy levels, which are foundational for metabolic health and cognitive function.
Verdict
A safe, evidence-based tool for optimizing circadian rhythm and mood.
HEALTHSPAN IMPACT
Moderate
RISK LEVEL
Very Low
EVIDENCE GRADE
A
MONTHLY COST
$30 - $200
Protocol
- Use a 10,000 lux lamp for 20-30 minutes within the first hour of waking.
- Position the lamp at a 45-degree angle to avoid direct eye contact.
Flags
- Consult a physician if you have bipolar disorder, as it may trigger mania.
- Avoid staring directly into the light to prevent potential eye strain.
- Late-day use can disrupt sleep patterns and cause insomnia.
- Ensure the device filters out UV light.