Can red light improve sleep quality?

Yes, red light can improve sleep quality. Andrew Huberman emphasizes that using red lights in the evening can help reduce cortisol levels and create a more calming environment, which facilitates falling asleep easier and improving overall sleep quality 1.

This is achieved because red light lacks the blue wavelengths that stimulate the brain and cortisol production, which are associated with wakefulness 1. Additionally, red light is often dim, enhancing the transition to sleep by not significantly disrupting melatonin levels 2.

These practices can be very effective, especially in reducing stress hormones and aiding the body to switch into sleep mode more readily 3. Therefore, if you're looking to improve your sleep environment, red light can be a beneficial and relatively inexpensive tool to consider.