Thanks to yesterday’s preternaturally warm weather I was able to expose enough skin to the deadly ultraviolet ray of the sun as to make a non-trivial quantity of vitamin D. (Plus, get in a very nice walk at the River Bend Forest Preserve.)
Some time in October every year I quit being able to get enough sun to make my own vitamin D. Eventually it gets too chilly to go out with enough skin exposed, and even if it stays warm late into the fall, eventually the implacable reality of the earth’s axial tilt means there simply aren’t enough minutes of the day when the appropriate frequencies of UV light shine down where I live.
As a practical matter, this period runs about six months. By early March there’s probably enough UV available, but it’s usually early April before the stars align such that we can take full advantage. We need days when it gets warm fairly early, because the UV is only available for a few hours right around solar noon. (Warmth at 3:00 PM is great, but doesn’t help with the UV until later in the year when the sun is even higher.) We need to get at least two or three of those days each week. (Just two days would probably be enough, if one never had schedule conflicts that kept one out of the sun around solar noon.)
My experience has been this all works out to mean that I need to rely on supplements for my vitamin D needs for right around 180 days per year. With that in mind, I’ve taken to buying two 90-pill bottles of vitamin D each fall.
When I notice—as I say, usually sometime in October—that it has been several days since I managed to get enough sun, I start taking the pills.
Just a few days ago, I finished my first bottle and opened my second.
That means I’ve made it halfway through! Another 85 or 87 days and I’ll be done with the pills and able to make my own vitamin D!
The last few years I was taking 1000 IU pills. This year I upped it to 2000 IU each day. (Not quite as big a change it sounds—I used to eat a lot of children’s breakfast cereals, often supplemented with vitamin D, but since I went low-carb I’m eating a lot less of those.)
It’s still a somewhat higher dose, which I think may be helping. So far this year I’ve only had a couple of days when I found myself glum for no good reason, a bit better than average, I think.
Steven always warns me against imagining that spring starts before April. But soon—less than 90 days now—I’ll once again be able to make my own vitamin D.
Today is the last day this season that sunrise (where I live) is later than 7:15:00 AM.
The natural movement people I follow continue to broaden my perspective on what constitutes natural movement. Fairly recently, in her podcast, Katy Bowman pointed out that dilating and contracting the pupil of your eye is a natural movement.
Most people spend most of their time at just a few lighting levels—dark (however dark they keep the room they sleep in, which often isn’t very dark), medium (ordinary indoor light levels), and bright (ordinary outdoor light levels). Katy suggests that there may be some benefit in experiencing the whole range of light levels, from in-the-woods-at-night dark to full-sun-at-midday light—and most especially everywhere in between.
It’s an idea that appeals to me, and I’m inclined to copy her and go outdoors while it’s still dark, and take a walk during the time from just before dawn until just after sunrise.
Taking such an early morning walk would be a change to my daily routine, and whenever I think about adjusting my daily routine I like to compare it to that of Charles Darwin. He was so productive for such a long time, I figure his is a touchstone for a successful daily routine. So I went and checked and was very pleased to see that Darwin’s daily routine included a pre-breakfast walk of about 45 minutes.
I’d previously copied some elements from Darwin’s routine, but I hadn’t taken that one. I’ve been spending that time at the computer checking email, Facebook, and my RSS feeds, and chatting on-line with my brother. Those are all things that are probably worth doing, but maybe they don’t need to be the very first things I do in the morning.
I’ve been thinking about doing this for a while, but spring has been cold and damp and not really conducive to early morning walks.
This morning I took a test walk, strolling around Winfield Village and in the Lake Park Prairie Restoration in the half hour before sunrise. It was very pleasant.
The solstice snuck up on me this year. The calendar shows it as being today, which it is if you live east of the United States. But it was actually a few minutes before midnight on the east coast and more than an hour before midnight here.
Happily, Geoff Landis (one of my Clarion instructors) posted a “happy solstice” message on Facebook (with a link to an astronomy site with the details) a few hours before the event, so I was able to appreciate it prospectively.
The longest night of the year has come and gone. I’m glad that’s over.
Why, in just six weeks, it’ll be Groundhog’s Day! And once that happens, it’ll be time start looking for our early spring!