Humans may not hibernate, exactly, but that doesn't necessarily mean we're totally unaffected by the changing of seasons.

Howcast - Learn what a light therapy facial is from licensed esthetician Joanna Vargas in this skin care video from Howcast.

Howcast - Learn how light therapy is used to treat acne from dermatologist Cybele Fishman, MD in this Howcast skin care video.

This video will help you understand the differences between the holiday blues and SAD, learn about the two types of SAD, and discover the possible causes and interventions for this seasonal mood disorder. Dr. Marks breaks down the...

Life without enough sunlight can have a damaging effect on the human body causing a range of problems. In cold and harsh places like Lapland, the winter sunlight is short, with the sun rising around 10am and setting at 2pm. This is...

Explore how our bodies instinctively react to cold weather to maintain a constant internal temperature. Learn about the physiological adjustments, from constricted blood vessels in extremities to the appearance of goose bumps, that...

Light therapy, using a laser, is a new and effective approach for treating psoriasis, a condition that causes scaly eruptions on the skin. Unlike traditional steroid treatments, light therapy has proven to be superior and has fewer side...

Uncover the surprising impact of Daylight Saving Time on mental health and body rhythms. Explore how the Sunshine Protection Act could change our mornings and learn practical tips for realigning your circadian rhythm with bright light...

How does light work for sleep? Light has a strong influence over the timing of your circadian rhythm. Light triggers the shut down of melatonin in your brain. So we can use this to our advantage when trying to regulate sleep...

A light box can be useful for more than seasonal affective disorder. It has been recommended for use as an add-on treatment for depression. It can also help shift your body clock. This video shows you how to use a light box.

Do depressed people need to sleep more? It would seem so, but when a depressed person stays awake, their depression resolves. The problem is it’s very temporary until the person goes back to sleep. Researchers have found...

Bright light therapy for bipolar depression. We used to recommend light therapy for people with bipolar disorder with caution. The reason for caution was that the light could trigger a manic episode in some people. With further...

If you often feel the winter blues, it may be more than normal sadness. While some welcome the change in seasons and the fresh snow of winter, others find themselves falling into feelings of depression. But this isn’t just short-lived...

This video explores the power and influence of color on our emotions and perceptions. It discusses how different colors can evoke specific feelings and reactions, as well as their cultural and symbolic meanings.