The real question ought to be, “Why is Vitamin D a problem right now?” Because when I was a child and into my twenties, it wasn’t an issue. I’m 55, so I am referring to the 60’s, 70’s and 80’s. Back then, I sported a dark brown tan every summer and in my twenties I kept it up year round using tanning booths in the winter. In my childhood, we didn’t talk about sun screen. Babies wore sun hats, mother’s kept them covered, toddlers ran around with tans. My brother and I have olive toned skin and many remarked to our mother about our beautiful dark tans. People who had very pale skin, were cautious when in the sun, but still out in the sun, they were the only ones I saw using salves to protect themselves from burning aside from life guards with bright white stripes of sun block on their noses. We all suffered a sunburn sometimes. I don’t recommend them, they’re not fun, but for most of us, they weren’t the end of the world either.
Its true, too much sun could damage skin and for a few, cause skin cancer. But, I feel we’ve gone way too far in the other direction, where we get no sun anymore. Especially in the north where sun is limited to begin with. In the summer we slather the highest SPF lotions we can find, lest the sun touch our skin. All my life, I’ve met only 2 people with skin cancer (mild cases). And, before you get all up in arms, be rest assured that I am not disputing that skin cancer is real, and maybe its only a coincidence that I’ve only met two people. I am only suggesting moderation and balance. For most people, some sun is not just good, but needed. Sun light is needed to produce vitamin D. It can be had through supplements too, which is what I do. I take 10,000 IUs of Vitamin D3 per day in the form of drops. Fair skinned Dr. Wahls takes 6,000 IUs in the winter along with short visits in a tanning bed and decreases to 4,000 IUs in the summer, whereas she is an avid Gardner and rides her bike to and from work most days.
It is a fact that lack of Vitamin D has been linked to autoimmune diseases and other equally surprising conditions:
“A lack of vitamin D has also been linked to some other conditions such as cancer, asthma, type-II diabetes, high blood pressure, depression, Alzheimer’s and autoimmune diseases like multiple sclerosis, Crohn’s and type-I diabetes.” – https://www.vitamindcouncil.org/about-vitamin-d/what-is-vitamin-d/
Yes, we had these diseases then too, but not to the outrageous degree that they are now prevalent in our society these days. When I was a child, I met one person who had MS. In my twenties, I knew another. Two people in two decades. The last two decades the opposite has been true, autoimmune diseases of all sorts are cropping up everywhere in cooler climate industrialized nations. Interesting though is the fact that I knew two people my entire life who had skin cancer, the kind they can remove. That is not to say that it doesn’t exist, that it shouldn’t be a prudent concern, especially for those with fair skin, who are most susceptible to damage. The darker your skin is the more melanin you produce, which is the skins natural defense against the sun that, paradoxically, is produced when the skin is exposed to sun light.
Melanin gives the skin its pigment. The darker your skin is the better protected you are from the sun. This is the reason why warmer climates have darker skinned people. A natural occurrence to the environment. My grandparents are from Southern Italy, hence the olive tone to my skin and gives me a decreased chance of sun burns. I can burn. I need to be cautious the first one or two times out in the sun and use sun block. Once a tan begins to build, I don’t burn anymore. A tan is the skin producing melanin in response to the sun for protection.
I am not an expert, but I have left three addresses from both sides below. I suggest that you take the time to read up. It is important to say that Vitamin D is not the only reason for the sharp increase in autoimmune conditions, there are other factors, which is why Vitamin D is only one of the components of the Protocol, but it is definitely a factor.