Valkee Science & Placebo

Reduced daytime light causes varying mood swings to many of us, from mild winter blues to severe seasonal depression 1. The Valkee Bright Light Headset increases the amount of light that the brain tissue gets easily, safely and effectively. Researchers at Oulu University in Finland have studied the effect of the Bright Light Headset since 2008 and are convinced that they have discovered a breakthrough in preventing and treating seasonal and ordinary depression.

Valkee Double-Blind

Today, bright light is a well-accepted and effective treatment for a variety of mood swings and especially seasonal depression. Valkee’s scientific program focuses on resolving light-dependent biological processes and their therapeutic applications in mood swings, depression and sleep disorders for light channeled via ear canal.


Valkee’s scientific program has discovered the following:

The University of Oulu scientists discovered that our brain, not just eyes, are sensitive to light.

Human brain is sensitive to light when it’s administered directly through the ear canal, not just our eyes.

Valkee improves cognitive performance of students and professional athletes in two controlled studies 

In a study, completed by Oulu University researchers, 41 graduate students of Aalto University were randomly divided into two groups, one of which received a daily 12-minute dose of Valkee for three weeks. The control group received no treatment. At the start and end of the study all participants completed a test, which measured cognitive activity with Cognispeed software.  64,7% of the test group that had received Valkee treatment improved their cognitive test score with a statistically significant difference to the control group.

In a second study the Verve sports science research unit organized a double-blind placebo-controlled study on motoric reaction speed to visual and audio stimulus of ice hockey players in the Oulun Kärpät National League team. The 22 players of the Oulun Kärpät team were randomly divided into two groups, one test- and one placebo-group, both with 11 athletes. The test group received a daily 12-minute morning dose of Valkee bright light via ear canal for three weeks. Placebo-treatment was administered with a Valkee-device that had been disabled. The main finding of the study was that the motoric reaction speed to a visual stimulus – i.e. how quickly the athlete was able to react to what he saw – increased with the test group by 20% during the study compared to before the study. The difference between the test- and the placebo-groups was statistically significant.