Light, dark, sleep, tryptophan, serotonin, melatonin and winter depression are topics discussed in this interview with Dr Craig Hudson.

This is the English version at your request, the Swedish version you'll find here / episode 65.

Craig is a scientist and a medical doctor within psychiatry. He promotes lifestyle changes such as diet and light, before using antidepressants/ SSRI.

Craig has done studies on neurotransmitters and tryptophan, and has also studied light therapy, so these topics we'll discuss in detail in this interview.

What is SAD and why do some persons get winter depression? Which neurotransmitters are involved? How do you prevent SAD? How does light therapy affect the body and brain? What role do different colors of light play? What's the connection between sleep and SAD? What will happen to your sleep if you are deficient in vitamin B3? What is circadian rhythm and how does it affect us? How is serotonin and melatonin connected? These questions and many more will be answered by Craig in today's episode.

About 40 minutes for you to listen to during a walk or on the bus!

You can listen to it on your phone, using a podcast app, or on your computer.

Search for the podcast "4Health med Anna Sparre" in your podcast app (iPhone), or open the link to 4health's podcast feed in you app (android). This is the podcast feed to copy: http://4health.se/category/podcast/feed

On your computer you can either listen by pressing the small grey "play" button below, or in iTunes. Direct link to iTunes: https://itunes.apple.com/se/podcast/4health-med-anna-sparre/id907951009?mt=2