All light is the problem

• Your brain will be most alert between 10 AM and 3 PM. That is when your best work or learning is done.
• If you still don't feel awake, you may need even more early sunlight. You need at least 1 hour of daylight exposure outside to reduce sleepiness and stay happy and productive thro...

You need around seven hours of sleep a night. Children need more, and older folks less. Sleeping much more or notably less than seven hours is associated with a shorter lifespan.

Consistency is as important. You need a regular schedule for when you wake up, when you have y...

Every cell and organ in your body has a clock. If things are working right, they are in sync with your brain. But if things aren't in sync, your hormones are out of whack, causing problems with your energy levels, hunger, stress and overall health.

The most important facto...

As soon as you wake up, go outside and get sunlight onto your eyes. (Don't stare directly into the sun.)

Your retinas get more sensitive as the day goes on, and they are less sensitive in the morning. You need to spend about 2 - 10 minutes outside, depending on how bright ...

Many people live like shift workers to some degree. The majority of people either go to bed after midnight or wake up early without getting enough sleep.

Shift work is a probable carcinogen, according to the WHO. Moreover, there is a list of health problems associated with...