Dr. Jack Kruse Explains the Importance of Sunlight Vitamin D for Health
Of all the health secrets, one of the most sought-after is how to optimize our health, and a common question is why health and healing have to be so complicated. But perhaps it doesn’t.
Neurosurgeon Dr. Jack Kruse carries a simple message to think about how exposure to sunlight has gotten a bad rap over the past few decades and how our relationship to the sun is the key to staying well and energized.
Dr. Kruse says we seem to have forgotten that the sunlight’s system of photosynthesis supports most of the food chain on this planet. And, since our skin is derived from neuroectoderm (cellular structures associated with the brain and nervous system) we rely on the sun for photosynthesis to make vitamin D to protect our health. Vitamin D is too often overlooked by modern medicine in its role to keep us alive and healthy. Maybe, suggests Kruse, we need to rethink our position on Vitamin D and how we produce it.
Let There Be Light
In a recent interview, Dr. Kruse tells Regina Meredith that too many of us are continually exposed to artificial indoor light, causing us to miss out on vital factors required to boost the immune system and allow it to work optimally. Our bodies require the full spectrum of the sun’s rays to produce vitamin D, a hormone naturally created in our skin cells and used for myriad biochemical processes.
The Mayo Clinic explains that vitamin D is needed to regulate many cellular functions in the body and acts to support anti-inflammatory responses, antioxidant activity, nerve cells, the immune system, muscle function, and brain cell activity. Beyond this, explains Dr. Kruse, vitamin D is helpful in warding off viruses and bacteria, and helping the cells efficiently create and use energy.
Vitamin D is an overlooked nutrient, especially in northern climates where sunlight can be scarce for months at a time. Kruse links a number of health issues with vitamin D deficiency, including obesity, bone malformation, psoriasis, heart failure in the newly born, osteoporosis, cardiovascular disease, arthritis, mental illness, diabetes, and even cancer, as well as most autoimmune diseases. Much of these health issues may be attributed to what Dr. Kruse calls a “quantum-biological problem,” meaning that it’s a story about sunlight and our relationship to it.
A fact of nature is that skin color, as well as other personal health factors, influences how much sunlight we need, which determines our state of health, the efficiency of the immune system, and the production of energy in our cells. People with darker skin need more sunlight than those with lighter skin to produce vitamin D. It’s not a racial problem, says Kruse, but rather a biological issue, despite how media may misinterpret it and how some physicians can misunderstand or overlook this fact. We have to be aware of our skin type and gauge our exposure to the sun accordingly, to glean the benefits of good health and to ward off a host of illnesses.
Powering Up Your Cells
Each cell in our bodies contains an energy-producing powerhouse called the mitochondria. Dr. Kruse explains that mitochondria need fuel from sunlight to produce basic electrical charges. And without enough vitamin D to produce sufficient electricity in the cells, the body cannot protect itself from myriad illnesses. So, explains Kruse, people with darker skin, those who spend too much time indoors, people who tend to be overweight, and other groups may lack the electrical energy needed to remain healthy. The cure is to maximize natural light and the intake of plenty of water while minimizing artificial light.
In “Sun: Full Spectrum Healing,” Dr. Kruse explains how sunshine provides “infrared A light,” the most important factor needed for the health of the mitochondria because it’s the only frequency of natural sunlight that can penetrate deeply enough into our bodies. However, glass—like that in your office, car, or home—blocks out 40 to 60 percent of this all-important light frequency. Once the sun’s “infrared A light” reaches the cells of your body, it helps repair or gets rid of damaged cells. This natural process of cellular death (apoptosis) and turnover (autophagy) boosts the immune system, creates T-cells to fight disease, and produces antigens to trigger the immune response.
Wake Up and Smell the Sunshine
Dr. Kruse offers a wake-up call and warns us that we should be thinking of sunlight as more of a friend than the enemy so many physicians have painted. “It is beyond me why the sun is so vilified,” writes Kruse. “We could not have evolved past single-celled organisms without it. We all learned that simple fact in school. But now with our advanced degrees and plaques on our wall, are we going to blame all skin diseases all on the sun?”
Since we are biological beings wholly dependent upon our one and only sun, it’s incumbent upon us to let it nurture our mind, bodies, and environment, and find a way to bathe in the outdoor light.
Why Do We Sleep? For More Reasons Than You May Think
Most of us spend about a third of our lives asleep, despite not really having an answer to the question, ‘why do we sleep?’ Now neuroscientists are realizing that sleep is more important than previously thought. They’re also realizing that the worn-out platitude, “you can sleep when you die,” is terrible advice, as that day will undoubtedly come sooner if you short yourself on a good night’s sleep.
According to most contemporary research, you should be getting around seven to eight hours of sleep every night, and if you think you can get by on fewer than that, there’s a really good chance you’re fooling yourself.
Why is Sleep Important?
While the exact mechanisms of sleep are still being studied, neuroscientists including Matthew Walker have made interesting learnings about what happens when we deprive ourselves of sleep and the impacts sleep (or lack thereof) has on society as a whole.
When we’re awake, Walker says that essentially, we’re causing low-level brain damage. By this, he is referring to the build-up of the sticky, toxic junk in our brain known as beta-amyloid. This accumulation of beta-amyloid has been found to correspond with the onset of Alzheimer’s, among many other adverse health effects correlated with a lack of sleep.
Sleep is beneficial as more than just a healing function; it also replenishes spent resources and regulates hormone levels that dictate our appetite, cognitive function, and motor skills. The two hormones that dictate whether we are hungry or full, ghrelin and leptin, have been observed to flare up and down, respectively, when we’re sleep deprived. This inevitably leads to an increase in hunger, but even worse, it leads our bodies to crave unhealthy and fattening foods — those heavy on carbs and light on greens. In fact, people who run on four to five hours of sleep per night tend to eat 200-300 more calories per day.
For men, sleep is an important regulator of hormones, most notably testosterone. Sleep-deprived males can have the same virility and strength as a man 10 years their senior. For women, a lack of sleep can lead to a significantly increased risk of breast cancer and drops in immune hormones.
According to Walker, just introducing a single night of just four hours of sleep among a normal eight-hour sleep schedule, can bring about a 70 percent drop in natural cancer-killing cells, the immune assassins that target malignant carcinogens. Every day our bodies produce these cells and others to fend off disease and maintain our health, and while a cat nap might make you feel refreshed, it won’t make up for the loss of these cells.
