I guess I was distracted a couple of weeks ago when Chris Masterjohn posted his most recent article, because when i started rereading it this morning, it was all new to me. It's no secret that i'm an enthusiastic promoter of getting pre-formed vitamin A, and that it really chaps my hide that it's acceptable to say vegetables contain any -- CUZ THEY DON'T. CM gets extra credit from me for pointing this out, and also that there are a lot of people who CANNOT adequately convert the carotenes to the retinoids they need.
When i first began to concentrate on getting retinol into my diet-and-supplement regimen, i felt significant improvement in energy. This influenced me to make liver a regular part of my diet, because that seems to be the single most reliable source (for those of us who don't raise our own chickens/eggs, cuz GOK what even free-range commercial chickens eat).
But there were more interesting things to be read in this article, and he promises us EVEN more in the next. For one, he describes how a deficiency contributes to circadian disruption. For another -- and this prompts a great big toothy evil grin from me -- DRY EYES.
Dry eyes: the reason why a certain blogger claimed that a VLC diet made one "mucin-deficient"....
We've long known that THAT was hogwash, but here is a tidy little explanation of what he MIGHT have actually been suffering -- vitamin A deficiency.
The writer who annoyed me so much the other day claimed that we amateurs couldn't possibly know if we're dosing ourselves correctly because we can't "see inside" but again, if we have any insight concerning OUR OWN BODIES we can see an awful lot. I can long-distance diagnose my own mother's malnutrition in A and Mg simply from knowing her and her health history, not that she'd believe it as a "moderation with healthyfruitsandvegetables" kind of person. But "dry eyes," poor night-vision ... guess what?
Masterjohn also postulated another interesting thought -- since blue/bright artificial light degrades vitamin A in the eyes, perhaps those with light-colored eyes are particularly susceptible to depletion in the presence of lots of sunlight. He, with light-colored eyes, thinks that may explain why he seems to need more than average amounts of vitamin A. Coincidence that people evolving nearer the equator are more inclined to have brown or black eyes? I doubt it. My only excuse can be my genetics and the fact that my eyes are a rather LIGHT brown.