Anging effects (cancer effects) of sun to skin
Start from creams
Sun causes damage to the skin
In addition, the AAD and other health agencies recommend staying out of the sun during peak UV exposure hours—typically 10 am to 2 pm—and other measures like wearing protective clothing to avoid premature aging, sunburn, and skin cancer.
. Since no sunscreen is completely waterproof, you should reapply after swimming or activities that cause you to sweat.
Whichever product you choose should be applied liberally (about one ounce or 15 ml) and often (every two hours or so
Ingredients which filter out UVA rays, in particular, include Avobenzone (Parsol 1789) and Benzophenones. Ingredients aimed at filtering UVB rays include PABA, cinnamates, and salicylates.
The self-renewing capability of the epidermis, which provides vital barrier function, is diminished with age.
The dermal collagenous extracellular matrix, which comprises the bulk of skin and confers strength and resiliency, undergoes gradual fragmentation, which deleteriously impacts skin mechanical properties and dermal cell functions.
American Academy of Dermatology, Any SPF greater than 30, the NIH says, is simply unnecessary, in part because it makes people wrongly think they can reapply sunscreen less often.
The reality, however, is that companies can still sell subpar sunscreen without broad-spectrum protection (or the label), so consumers need to be educated. We should also remember that sunscreen alone may not limit our cosmetic or health risks from sun exposure. Wearing hats, shirts and cover-ups when we’re outside, and limiting our time in the sun are other basic steps.
sun’s damage to the deeper skin, especially to the elastic fibers and collagen
“If you see a 90-year-old person, and look at a part of their body that has not been exposed to the sun, you don’t see any photoaging,” he says.
UVB rays, which have shorter wavelengths and higher energy, cause DNA damage and photoaging in the epidermis, the outer layer of the skin. UVB is the chief cause of sunburn and skin inflammation. UVA rays, with their longer wavelengths and lower energy, penetrate deeper into the skin. They play a major role in skin aging and wrinkling (Mac-Mary 2010). Both UVB and UVA rays can cause gene mutations and skin cancer.
If you’re a health page aficionado, you’ll be shouting about vitamin D, or lack thereof. Trust me, I have thought about it. I expose my arms and back to the sun for about 20 minutes. This amount of UVB exposure in summer is enough. I make sure I don’t burn, and I never sacrifice my face. I supplement with vitamin D3 in the winter months
But one common misconception is if we are not suffering sunburn, then we are not damaging our skin. This isn’t true. UV-B (UV-Burning) causes skin redness and blistering in excess, but UV-A (UV-Ageing), while not causing obvious damage at the time, causes skin cancer and is more destructive in terms of skin ageing. UV-A damages our skin’s deeper layers, affecting the structures that keep it firm and youthful.
UV exposure seems to be responsible for 80% of visible facial aging signs.
Wrinkles and skin texture are influenced by both extrinsic and intrinsic aging, depending on the behavior of the individual with regard to the sun. The study confirms the accountability of sun exposure in premature aging of the face.
1. Sun Exposure May Cause Up To 90% Of The Visible Changes Attributed To Aging
The World Health Organization’s report called “Sun Protection: A Primary Teaching Resource” is dedicated to teaching people all about the health risks of UV radiation and how to protect yourself. In it the authors include information about sunlight, tanning, sunburn, skin cancer, eye inflammation, cataracts, and the fact that UV rays can reduce the effectiveness of your immune system—increasing your risk of getting sick. But they also briefly discuss the aging effect of the sun:
“Chronic overexposure to the sun can change the texture and weaken the elasticity of the skin. Sun induced skin damage causes premature wrinkling, sags and bags, and easy bruising. Up to 90% of the visible changes commonly attributed to ageing may be caused by sun exposure.”
“Repetitive exposure to solar UVR (ultraviolet radiation) is among the principal environmental factors that can hasten the aging process of the skin, accompanied by progressive impairment of epidermal stem cell function…UVR is known to be a mutagen; long-term overexposure to sunlight is associated with photoaging and formation of skin cancers. Interestingly, both photoaging and cancer-inducing effects of UVR are mediated through UVR’s direct and indirect toxicity to the DNA.”
“Compared with Japanese women living in Akita [less sun], Japanese women living in Kagoshima [more sun] had significantly longer facial wrinkles, higher number of wrinkles, larger hyperpigmented spots, higher number of spots, rougher facial skin texture, more yellow foreheads and upper inner arms, darker foreheads, and less stratum corneum hydration in the cheeks and arms. When compared on an age-for-age basis, the average 40-year-old Kagoshima women has the same level of facial wrinkling as a 48-year-old Akita women, a delay of 8 years for living in the northern latitude. For facial hyperpigmentation, the delay is 16 years; the average 40-year-old Kagoshima women has the same level of facial hyperpigmentation as a 56-year-old Akita women. The results further testify to the skin damaging effects of sun exposure and may be useful in public health education to promote everyday sun protection.”
skin of darker color is less susceptible to sun-induced damage
“A century ago, it was considered vulgar by the middle and upper socioeconomic classes to have suntanned skin. Bodies were covered, and hats were worn to prevent sun damage. The only people who showed the effects of habitual exposure to the sun were outdoor manual workers.”
“After World War II, all this changed. Starting in the late 1940s, society decided that tanned skin looked healthy. The healthy tanned look was considered socially desirable. As a result, skin changes from habitual exposure to sunlight are now more common and more extensive and appear at an earlier age than they did in the 1940s. Elderly people now seldom exhibit skin changes associated solely with aging; some changes have been caused by habitual exposure to the sun.”
The consequences of sun exposure are both cosmetic and medical. “Cosmetic changes include leathering of the skin, increased wrinkling, and reddening. Medical changes include more frequent development of melanoma and nonmelanoma skin cancer, development of innumerable keratoses of various sorts, and the tendency of sun-damaged skin to get more easily irritated and bruised.
American academy of dermatology lists ‘protecting your skin from the sun every day’ as the NUMBER 1 way to reduce premature skin aging.
The patient reported that he had driven a delivery truck for 28 years. Ultraviolet A (UVA) rays transmit through window glass, penetrating the epidermis and upper layers of dermis. Chronic UVA exposure can result in thickening of the epidermis and stratum corneum, as well as destruction of elastic fibers. This photoaging effect of UVA is contrasted with photocarcinogenesis.
Rock a hat and sunnies – If you’re going to be out in the sun for a while, bring a wide-brimmed hat or cute umbrella to shade your face. Sunglasses will protect your eyes and keep you from squinting and fend off crow’s feet!
ultraviolet radiation from the sun has been classified by the World Health Organization as “known to be carcinogenic to humans.
“FRY NOW — PAY LATER!!”
A woman in her early 50s who has had too much sun may look 10 years older than her actual age but she does not have to accept that “fate.”
. Recent research has also shown that high-energy visible ( HEVIS) light rays contribute to the premature aging of skin, though to a much lesser extent than UVA. Read more in How the sun ’ s UVA , UVB and HEVIS light rays affect skin.
: ‘Our study confirms the accountability of sun exposure in premature ageing of the face.
‘Our comparison between two groups of women, whose sun behaviour was different, has allowed us to clearly demonstrate the effect of UV exposure.’
By 2020, 25% of the US workforce will be composed of older workers— sometimes called the Silver Tsunami—and epidemiological, biological and molecular data all point to skin cancer as predominantly a disease of the elderly. Between 40% and 50% of Americans who live to age 65 will have skin cancer at least once
Suffering just five sunburns over your lifetime more than doubles your chances of developing melanoma, and each successive tan or sunburn raises the risks further.
The first part is exceedingly easy: simply never climb into a tanning bed; more people develop skin cancer because of UV tanning than develop lung cancer because of smoking.
Adam
Sunscreen protects mostly against uvB but not uvA, which is at longer wavelenght and can penerate the skin deeper. uvA is the one that causes the tanning, but it can hurt very bad the stem cells.
uvA has such a big wavelenght that it’s impossible to protect from all of it, still best sunscreens should be able to.
Cream should be used at least 2ml/ square centimeter, so the calculation. 1 ml of suncreen just on your face. Most people put a lot less.
uvB causes sunburn. Cheap suncreen still lets uvA hit the skin and damage it.
Misconception: vitamin d production, is not halted by sunscreen because uvA spectrum still penetrate the skin, so with uvA there is still vitamin D effect. There is a list of ingredients that protect from uvA and broad spectrum filters.
As for inorganic ingredients, zinc protects from uvA
Systemic sun protection is also very important: beta carotene, vitamin c, retinol, selenium, aspirin, green tea poliphenols.
You want to protect your cells with vitamin C, but it’s important to do so in the morning, you need at least 1 gram of vitamin C to run through your bloodstream, reaching the peak 2 hours after you ingested the vitamin c, after that there is a 10 hours protection.
uvA causes Ros, that cause dna damage, ros can damage protein and negatively influence different pathways.
Uvb causes direct dna damage, crosslinking the dna and oxidizing it directly.
‘both my folks have worked outdoor construction for 35+ years. Both are religious about sunscreen and I think it shows. I am following their lead because results don’t lie.’
