We are an independent, non-profit professional organization dedicated to education &
research on new environmental therapies.
Here you can learn all about SAD and the health benefits of enhanced light, plus
a chance to win our featured light therapy lamp!
SAD is a collection of mood, energy and physical symptoms that appear in fall and winter , particularly in the northern half of the United States, but throughout the country and around the world. SAD sufferers can count on relief in the spring and summer, but the other half of the year can be very challenging.
The biggest culprit is later sunrise, along whith shorter hours of sunlight from september throught March. This seasonal change affects our inner clock— known as our carcadian rhythm — shifting in later in the day. Genetic factors can also play a role and can make
you more vulnerable to depression.
In addition to depressed mood, the range of symptoms can include increased appetite, weight gain, intense fatigue, difficulty waking up in time for school or work, and/or withdrawal from social contact. Appetite and sleep changes often occur weeks before mood becomes depressed, but the pattern can vary from person to person.
Why we're programmed differently.
Founded in 1994, CET is an independent, non-profit professional organization dedicated to education and research on new environmental therapies.
We offer a variety of services, including background information, self-assessment questionnaires, and environmental therapy products.
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