Center for Environmental Therapeutics

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Center for Environmental Therapeutics

CET is a non-profit dedicated to education and research on new environmental therapies.

Environmental Therapeutics is...

a growing set of effective treatments that utilize natural elements including light and air. Difficulties that tend to respond well to these therapies include:

🔸Depression
🔸Mania
🔸Troubles with sleep
🔸Daytime fatigue
🔸Reactions to shift work
🔸Changes with Daylight Saving Time

01/27/2026

🌬️ Stuck inside with stale air, low energy, and foggy thinking? It might be more than just “indoors blues.”

Research shows that high-density negative air ionization (a type of charged air similar to the fresh air by waterfalls and sea spray) has been shown in controlled trials to lift mood and improve alertness for people with SAD and beyond.

👉 Keep reading in the comments to learn more about 𝗵𝗼𝘄 𝗶𝗼𝗻𝗶𝘇𝗲𝗱 𝗮𝗶𝗿 𝗰𝗼𝘂𝗹𝗱 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂𝗿 𝗺𝗼𝗼𝗱.

01/26/2026

🕰️ 𝗦𝘁𝗿𝘂𝗴𝗴𝗹𝗶𝗻𝗴 𝘁𝗼 𝘄𝗮𝗸𝗲 𝘂𝗽 𝗳𝗲𝗲𝗹𝗶𝗻𝗴 𝗿𝗲𝘀𝘁𝗲𝗱 and ready even after you’ve gotten up early? New science shows it’s not just about discipline: it’s about when your brain gets light.

Early-morning light helps reset your internal clock, lift your mood, and sharpen your focus in ways coffee can’t.

👉 Keep reading in the comments to dive into the full article.

01/25/2026

🌥 Seasonal Affective Disorder (SAD) doesn’t have to be something you just “get through.”

Effective treatments range from lifestyle changes and light therapy to professional support, all aimed at 𝗹𝗶𝗳𝘁𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗺𝗼𝗼𝗱 𝗮𝗻𝗱 𝗿𝗲𝘀𝘁𝗼𝗿𝗶𝗻𝗴 𝗯𝗮𝗹𝗮𝗻𝗰𝗲 during the darker months.

Continue reading in the comments 👇

01/23/2026

📘 Looking for real-world solutions to Seasonal Affective Disorder?

The book 𝘋𝘦𝘧𝘦𝘢𝘵𝘪𝘯𝘨 𝘚𝘈𝘋: 𝘈 𝘎𝘶𝘪𝘥𝘦 𝘵𝘰 𝘏𝘦𝘢𝘭𝘵𝘩 𝘢𝘯𝘥 𝘏𝘢𝘱𝘱𝘪𝘯𝘦𝘴𝘴 𝘪𝘯 𝘈𝘭𝘭 𝘚𝘦𝘢𝘴𝘰𝘯𝘴 by Norman E. Rosenthal breaks down evidence-based approaches, from light therapy and lifestyle changes to clinical insights that help you 𝘁𝗮𝗸𝗲 𝗰𝗼𝗻𝘁𝗿𝗼𝗹 𝗼𝗳 𝘆𝗼𝘂𝗿 𝘄𝗶𝗻𝘁𝗲𝗿 𝗺𝗼𝗼𝗱.

Find a full review on this book in the comments below 👇

01/22/2026

🧠 Winter depression shares some things in common with jet lag: sluggish energy, foggy thoughts, and feeling unmotivated.

𝗧𝗵𝗲 𝗴𝗼𝗼𝗱 𝗻𝗲𝘄𝘀? Light therapy was developed to treat SAD and can be just as powerful as medication when done right.

Head to the comments to learn how to choose the right lamp and the most effective time for your sessions. ☀️

01/21/2026

💬 𝗧𝗼𝗱𝗮𝘆 𝗼𝗻 𝗔𝘀𝗸 𝗢𝘂𝗿 𝗘𝘅𝗽𝗲𝗿𝘁𝘀: “I’ve lived with mild to moderate SAD for years. Light therapy helps my mood… but why is my sleep still a mess?”

Our experts explain why light therapy works for some symptoms... and when insomnia needs a different approach. 💡

👇 Read the full expert answer in the comments.

01/20/2026

🌥️ Hit that gloomy stretch of the year and 𝗻𝗼𝘁 𝘀𝘂𝗿𝗲 𝗵𝗼𝘄 𝘁𝗼 𝗰𝗼𝗽𝗲?

Neurobiologist Anna Wirz-Justice — one of the pioneers of light therapy and member of CET's board of directors — explains why getting bright light in your eyes early in the morning can act like an antidepressant, even on foggy or rainy days.

Read more in the comments ⬇️

01/19/2026

🔵 If “Blue Monday” feels exactly the same as every other winter Monday…

it might not just be a bad day: it could be Seasonal Affective Disorder. ☔

Feeling low, unmotivated, tired, or off 𝗮𝗹𝗹 𝘄𝗶𝗻𝘁𝗲𝗿 𝗹𝗼𝗻𝗴 isn’t something you have to push through.

If this post feels a little too relatable, head to the comments 👇

01/19/2026

Ever wondered what it’s like to wake up 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗮𝗻 𝗮𝗹𝗮𝗿𝗺 feeling energized? 🌅

It starts with knowing when your body clock naturally wants to wake up. If you still don’t know whether you’re a night owl or an early bird, check out the comments ⬇️

01/16/2026

Light doesn’t just brighten rooms... it can brighten mood too. 💡

Bright light therapy may help ease 𝗺𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝗳𝗼𝗿𝗺𝘀 𝗼𝗳 𝗱𝗲𝗽𝗿𝗲𝘀𝘀𝗶𝗼𝗻, not just SAD.

Want to know how it works and who it may help?
⬇️ Head to the comments to read more.

01/15/2026

Some winters feel like a slow fade... 😶‍🌫️

For Andrea, the dark months used to come with low energy, heavy mood, and mornings that felt impossible. 𝗜𝘁 𝘄𝗮𝘀𝗻’𝘁 𝗹𝗮𝘇𝗶𝗻𝗲𝘀𝘀: it was Seasonal Affective Disorder, and every year it hit her like clockwork. ❄️😔

Curious how she turned things around? Read her story in the comments.👇

01/14/2026

Waiting weeks or months for a therapist or psychiatrist appointment can leave you stuck with anxiety, low mood, or overwhelm. 😞📱

New research shows that some 𝘀𝗺𝗮𝗿𝘁𝗽𝗵𝗼𝗻𝗲 𝗮𝗽𝗽𝘀 𝗴𝗶𝘃𝗲 𝘆𝗼𝘂 𝘁𝗼𝗼𝗹𝘀 to make meaningful progress before your first appointment.

👇 Read more in the comments.

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31 Harvard Street
Worcester, MA
01609

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+16463958241

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http://www.cet.org/

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Our Story

CET is an independent, non-profit professional organization dedicated to education and research on the new environmental therapies.

We are scientists and clinicians who work in the fields of psychiatry, psychology, chronobiology, sleep research and medicine, and gather on this website the findings of world-wide research on ENVIRONMENTAL THERAPEUTICS to help individuals and clinicians.

These treatments cover many clinical syndromes and diagnoses, in particular mood and sleep disorders, shift-work problems, but also children’s development, the ageing process, healthy architecture, and the politics of daylight saving time.

Visit our website for more information: www.cet.org

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