On a status update, Alexandra Carmichael (of CureTogether) noted she was taking 4000 IU of Vitamin D3. I asked her for details:
I’ve been taking 2000 IU of D3 every morning for many months, but after hearing about your Meetup talk topic from Gary/Ernesto [“Vitamin D3 and Sleep”] and talking to [redacted] about his experience with it, I decided to switch to 4000 IU, starting yesterday. I take it between 6 and 7 am, with my other morning supplements/meds.
Yesterday I noticed an unusual sense of “clear and smooth” mood for much of the day, which is very odd for me. The day after a meetup, I usually experience intensely fluctuating moods (I’ve been tracking hourly moods, and on my worst days, it’s a 3-hour cycle between peaks, like a super rapid cycling, ultradian bipolar – my therapist suggested this term when I showed him my mood tracking data.)
I also slept unusually well – I’ve been having a good deal of trouble sleeping lately, both falling asleep and night waking. Last night I slept a solid 8 hours!!!
That’s a very small sample (one day) of what happens with 4000 IU. However, Alexandra’s experience is similar to mine. I found that 2000 IU of D3 had no clear effect compared to nothing. However, the very first night after I upped the dose to 4000 IU (from 2000 IU) my sleep was noticeably better.
Alex is using Nature’s Bounty 2000 IU Vitamin D3 gelcaps.