Cortisol regularly fluctuates in healthy individuals. It rises and spikes at sunrise, spiking slightly less again at noon and then decreases for most of the evening as shown below: …

I have a question about cortisol. It is a bit difficult because I want an informative answer. But I know - Paleohackers are very knowledgeable so hopefully somebody out there knows …

I'm not sure if this is the right place to ask this, but I have a question for all you paleo folks who are early risers. First, for some background info. I actually found out abou …

Ever since I can remember(really), i've been a "night owl". Even when I was a kid and had no reason to stay up late i.e. no computers,wasn't allowed tv at night, I always was up re …

I use f.lux on my macs to change the blueish screen glow to something warmer, which supposedly screws less with your circadian rhythms. I'd love it if there were something similar …

Are candles superior to standard lightbulbs and television/computer screens at night time in regards to circadian rhythm?

I gather nightlife is not very paleo or good for your circadian rhythm, sleep cycles, and melatonin production. What's a single grokster to do?

For some reason, I tend towards being awake at night. I've tried being awake in the day, and I don't like it as much. Also, for some reason, I sleep better during the day, althou …

Having just become aware of the existence of the term Delayed Sleep Phase Syndrome (Wikipedia), despite having had "symptoms" nearly all of my life that fit the "diagnosis" (I thin …

I wake up before the alarm on an almost exact schedule of 4:20 AM. My husband's clock is fast but he says that if he wakes and looks, (I'll often get up) that the clock says 4:26. …

There have been quite a few questions/posts around the web on the best time of the day to supplement with Vitamin D3 with regards to improving sleep (or at least not disturbing sle …