From the presence of vitamin D receptors in our cells and vitamin D factories in our epidermis, along with the central role vitamin D plays in calcium metabolism, immunity, and gene expression, it’s pretty clear that having adequate vitamin D is an essential component of being a healthy, successful homo sapien. And yet, many health practitioners suggest that vitamin D deficiency is one of the biggest nutrient deficiencies in modern society. The question, then, arises: What’s the best way to get enough vitamin D – via oral supplementation or sunlight?
To determine that, let’s examine a few common questions surrounding the various modes of intake.
Before phototropic plants began bending toward sunlight, before jellyfish developed ocelli, the light-sensing organs that allow them to distinguish between up (sunlight) and down, before the bikini-clad beach denizens began tanning en masse, and before the first house cat followed the sliver of sunlight around the room all afternoon, our primitive, microscopic marine forebears were flourishing by converting the sun’s energy into chemical energy usable by biological life. You’re probably aware of photosynthesis, the process by which plants, algae, and other organisms do it and produce byproducts like oxygen, but even the unicellular archaea that do not produce oxygen utilize sunlight for energy. And if you aren’t obtaining energy directly from the sun, you’re probably eating the organisms that do. Either way, sunlight directly or indirectly supports all life (well, except for the chemoautotrophs living in deep sea hydrothermal vents feeding off of inorganic energy sources like iron, ammonia, or sulfur).
Marrow is great and all, but what about the bones that aren’t blessed enough to bear the sacred gel in easily extractable amounts? We can’t forget about those. Chicken backs, beef knuckles, ham hocks, chicken feet, lamb necks, hooves and any other animal-derived matrices of calcium phosphate and collagen fibers are all worth saving, cooking, and perhaps even eating. Hell, I bet elk antlers would make a fine, mineral-rich soup. The best part is that bones, feet, hooves, heads, and connective tissues are all pretty inexpensive, sometimes even free, parts of the animal. They also represent an entirely different realm of nutritional content than basic muscle meat, being complex organs playing multiple roles in the body.
We’re long overdue for a good, solid post on whey protein. I include it in my Primal Fuel shake mix, a number of readers asked about it after last week’s dairy post, and it’s one of the more commonly used nutritional supplements around, so it’s a no-brainer of a post.
Whey is a byproduct of cheese production. It’s that pseudo-clear liquid remaining after milk has been curdled and strained that used to be tossed aside as waste material. Today, we know that it houses an impressive array of proteins: beta-lactoglobulin, alpha-lactalbumin, and serum albumin. These are complete proteins, comprised of the essential amino acids central to protein synthesis and increased muscular hypertrophy. Our bodies can produce non-essential amino acids from lesser amino acids, but we cannot produce the essentials ourselves; we must eat quality protein sources. Whey is a naturally occurring, essential protein that satisfies the body’s protein requirements – hence its popularity.
As Aaron mentioned, we received nearly 250 fantastic questions. I could spend the next few months writing blog posts to address these questions exclusively. Needless to say, I’ll be using the comment board as a source of future MDA fodder, so check back often for answers to all of your questions.
What do you think of this video? It was our first time doing it this way, so it was a bit of an experiment. Do you like the format? There are a number of things I’d do differently in the future, but if you generally enjoy video content let me know and I’ll see about making this a regular feature of the blog.
Speaking of multi-media features on Mark’s Daily Apple, what does everyone think of a podcast? Would you be inclined to listen to an internet radio program in which I answer reader questions, hold interviews and discuss the Primal lifestyle? It’s just in the idea phase now, so I’d like to get a feeling for whether you’d be interested before putting it all together.
Thanks again to everyone for participating in this contest. Grok on!
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