Fibro Fix Blog — eye health

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Astaxanthin -- The Eyes Have It

Astaxanthin -- The Eyes Have It 0

The average youth spends approximately 7.5 hours each day using entertainment media, but even that seems conservative if you calculate the amount of time youths and adults spend staring at smartphones each day. In addition to the various psychological and social consequences of unbalanced screen time, the electromagnetic radiation from screens has been shown to damage both the cornea and retina of the eye. 
LED Light Risks

LED Light Risks 3

Incandescent lighting has served to illuminate the spaces of mankind since Thomas Edison first patented the lightbulb in the late 19th century. After nearly 130 years of service, this faithful lighting technology has suddenly been forced into retirement to make way for the newer, energy-efficient light-emitting diodes (LED) lights. Other forms of lighting have been introduced, including fluorescent and halogen, but none has had the authority to erase incandescent as LED has done.

While this new lighting technology brightly illuminates our homes with their alien-like glow, the energy industry is celebrating a victory.  LEDs use 75% less energy than incandescent lighting and could have the greatest potential impact on energy savings in the United States.  LED lights are manufactured to eliminate virtually all heat-producing infrared light. Instead, they function on an excess of cool blue light which has been coupled with a yellow phosphor to create the white LED light that falsely emulates natural outdoor light. The lack of heat explains their energy savings since 90% of the energy utilization of incandescent lighting is due to heat production from infrared light.

The energy efficiency of LED lighting cannot be disputed, but perhaps, a more serious outcome of this new technology is being overlooked and would give adequate grounds for debate. Namely, the health impact of LED lighting on humans and sleep disturbances, particularly.

In the past, human exposure to blue light has been limited to the light radiating from the screens of electronic devices, but the use of LED bulbs for domestic lightening has suddenly plunged us into a pool of blue light from the moment we awake to the time we retire.

Many studies have warned against the long-term use of blue light because of its ability to damage cells of the retina (rods and cones) and negatively impact our circadian rhythm. Intense light significantly increases the temperature of the retina and generates a significant amount of free radicals which damage retinal cells. The injuries are cumulative, leading to death of retinal cells and inflammation in the eyes.

The cells of the retina communicate with various organ systems of the body to inform them of the presence and intensity of light. The body can then make decisions regarding which hormones it should produce to either keep us awake and alert, or relaxed for sleep. As the cells of the retina are slowly damaged by LED lighting, our body’s ability to maintain a healthy sleep/wake cycle becomes compromised.

Melatonin is a hormone the body produces to prepare us to sleep. As the cells of our retina communicate light intensity, the body can decide when it is time to start producing melatonin. Blue light tells the body to stay awake and alert, and suppresses the production of melatonin. As we begin to turn on the LED lights in our homes at night, our body is confused as blue light pours into our eyes. Melatonin is suppressed and our circadian rhythm is disrupted. As a result, we have trouble sleeping. One study found a significant, dose-dependent suppression of melatonin with exposure to LED lighting.

The duration of exposure to blue light creates cumulative damage, which is why domestic LED lighting has posed more health risks than intermittent exposure to electronic devices. Disruptions in the circadian rhythm are associated with increased incidence of diabetes, obesity, heart disease, cognitive and affective impairment, premature aging, some types of cancer, and many chronic pain and fatigue syndromes which could lead to significant concerns related to the constant use of domestic LEDs. During the day, exposure to blue light stimulates alertness, but problems brew when blue light becomes the primary source of illumination at night.

LED lights not only pose problems to our circadian rhythm through exposure to blue light, but also through the magnetic fields that radiate from them. Electromagnetic fields (EMF) are invisible energy or electrical fields that span our entire environment and interact with the energy fields present in our bodies and in physical objects around us. Parents, doctors, and general consumers have been increasingly concerned about the possibility of long term health effects from exposure to EMF radiation. The strongest sources of EMF radiation include our electronic devices such as cell phones, computers, tablets, plasma televisions, routers and modems, utility “smart” meters, and remotes.

Melatonin secretion from the pineal gland is very sensitive to the influences from electric, magnetic and electromagnetic field. A study of 50 electronic equipment service technicians, exposed to various levels of EMF radiation, found significantly decreased levels of melatonin. Although LED lighting does not pose the same threat or possess the same degree of EMF radiation as electronic devices, the influence of EMF radiation, coupled with LED lightening can create a disaster for the circadian rhythm and quality of sleep. Using electronic devices such as a cell phone or tablet at night is particularly concerning since they shine blue light and radiate EMF waves.

The importance of quality and predictable rest and sleep can’t be overstated, especially for those with chronic pain and fatigue syndromes. Our circadian rhythm is set by the natural light-dark cycles and when the blue light and EMF radiation of LED lighting threatens that natural cycle, our health becomes compromised. Many modern-day diseases, including fibromyalgia, have been associated with sleep disturbances.

Sadly, the incandescent light bulbs are quickly being depleted from the market, leaving conscious consumers with very few options for safe lighting. Halogen lighting, a close relative of incandescent, may be the only option for light bulbs. If we understand the risks of LED lights we can be more aware of how often we use them.

Resources: 

  1. US Department of Energy. LED Lighting. Retrieved July 24, 2017, from https://energy.gov/energysaver/led-lighting
  2. Tosini, G., Ferguson, I., & Tsubota, K. (2016). Effects of blue light on the circadian system and eye physiology. Molecular Vision, 22, 61–72.
  3. Shang, et al. (2017). Light-emitting-diode induced retinal damage and its wavelength dependency in vivo. International Journal of Ophthalmology, 10(2), 191–202. http://doi.org/10.18240/ijo.2017.02.03
  4. Walsh, C., Prendergast, R., Sheridan, J., & Murphy, B. (2013). Blue light from light-emitting diodes directed at a single eye elicits a dose-dependent suppression of melatonin in horses. The Veterinary Journal, 196(2), 231-235. doi:10.1016/j.tvjl.2012.09.003
  5. Bonmati-Carrion, et al. (2014). Protecting the Melatonin Rhythm through Circadian Healthy Light Exposure. International Journal of Molecular Sciences, 15(12), 23448–23500. http://doi.org/10.3390/ijms151223448
  6. Lewczuk, B., Redlarski, G., Żak, A., Ziółkowska, N., Przybylska-Gornowicz, B., & Krawczuk, M. (2014). Influence of Electric, Magnetic, and Electromagnetic Fields on the Circadian System: Current Stage of Knowledge. BioMed Research International, 2014, 169459. http://doi.org/10.1155/2014/169459

ZUCCHINI – YOUR NEW BEST FRIEND?

ZUCCHINI – YOUR NEW BEST FRIEND? 0

If you live in a farming community or have friends and neighbors who garden, you’ve probably been the lucky recipient of their surplus zucchini. The summer sun seems to make zucchini multiply inexplicably and prolifically, such that growers will look to foist their harvest on anyone and everyone they can.  

But rather than bemoan the endless supply of this underrated vegetable, consider it a boon for a healthy diet. If you’re watching your carbohydrate intake, but find yourself missing your favorite pasta and noodle dishes, zucchini is your new best friend. If you can get your hands on a spiral slicing gadget—or can spare the time to cut long, thin strips by hand—the abundant supply of zucchini summer brings can be transformed into “zoodles,” which you can use to recreate spaghetti and meatballs, pad thai, and other dishes you might be craving, with the benefit of keeping things low-carb, gluten-free, or Paleo-compliant. 

Zucchini belongs to the botanical family Cucurbitaceae, which includes many familiar summer and winter squashes and gourds, such as yellow, crookneck, delicata and acorn squash, pumpkins, watermelon, cucumbers and ornamental gourds. 

Zucchini is a great addition to both omnivorous and vegetarian diets. It’s a good source of vitamins C and B6, riboflavin, vitamin A precursors, potassium, and manganese. It’s high in the carotenoid lutein, which is beneficial for eye health. Since lutein is a fat-soluble compound, and the body absorbs it better with a little bit of fat, it’s not a bad idea to add a pat of rich, yellow summer butter to steamed zucchini, or toss a pile of zucchini noodles with olive oil and garlic. Great side dishes for an outdoor dinner in the warm weather! 

Zucchini is very low in carbohydrate, with a glycemic index that is practically negligible. It’s a good choice for filling a plate without racking up high calorie levels, although excess consumption can potentially lead to unpleasant gastrointestinal side effects. Part of this is due to the fiber content of this non-starchy vegetable, but another reason is that during storage and shipping, the carbohydrate content of zucchini changes a bit. One of the compounds that increases upon storage is raffinose. Raffinose belongs to the FODMAP category—fermentable, oligo-, di- and mono-saccharides and polyols. It’s an oligosaccharide that the human body lacks the enzyme to break down, so consumption of high amounts can result in gas and bloating. 

With the growing popularity of “nose-to-tail” cooking for making use of all parts of animal foods, we shouldn’t forget that the same philosophy can be applied to vegetables. The yellow zucchini flowers that accompany each squash make a wonderful appetizer or side dish. A classic way to prepare these flowers is to stuff them with ricotta or goat cheese and fry them. Making zucchini bread or muffins is a good way to sneak these vegetables into unsuspecting children, and for those watching their starch intake, zucchini can be stuffed with an endless variety of toppings, including tomato sauce, olives, and fresh cheese, lending a pizza flavor, minus the dense bread base. Another way to make use of the avalanche of zucchini in summer is by preserving it, such as in relish, or simply blanching it and freezing it for winter. Dehydrating is another option, with crispy zucchini chips making a great, healthy snack for kids and adults alike. 

 

Sources 

  1. Sommerburg O, Keunen J, Bird A, van Kuijk FJGM. Fruits and vegetables that are sources for lutein and zeaxanthin: the macular pigment in human eyes. The British Journal of Ophthalmology. 1998;82(8):907-910. 
  2. Mildred E. Mathias Botanical Garden. UCLA. Economic Botany. Cucurbitaceae.