Sun Exposure and Your Health

by admin / Jul 08, 2015 / 0 comments

Sun exposure has beneficial effects on the body. The sun is vital for human existence gives us light, energy and heat. Sun exposure brings other benefits: bronze and bone health coveted by synthesis in the skin by sunlight vitamin D careprin fat-soluble vitamin, calcium fastening ensure growth, prevents rickets and osteoporosis combat.

Sunlight has antidepressant effects and some skin diseases improves Sun (atopic eczema, lichen planus and psoriasis). ( )

The dangers of sun exposure occur immediately or over time
Acute or chronic exposure to the sun has harmful effects on the body, especially the skin. Some people experience skin reactions immediately after sun exposure. Visible dangers that occur immediately after exposure to the sun are sunburn, heatstroke, sun intolerance and photosensitivity. The most common form of intolerance summer sun is shining benign appearing at 12-24 hours after exposure to sunlight and is manifested by an itchy rash appears on the neck, shoulders, arms and forearms and observe characteristic is that face and hands (they are not affected). Uricaria solar is more rare is a private uricarie triggered by sun and occurs in the first minutes after exposure by burning and then pruritic rash appears (redness and itching). Photosensitivity is an inflammatory reaction of the skin induced by the interaction of sunlight with photosensitizing substances. Photosensitivity reactions are Photoallergic (sun allergies) or phototoxic (photodermatitis contact dermatitis in keychain, melasma). Fotodermatitele is manifested by redness, rashes and itching or uneven pigmentation. Sun allergy is a reaction photosensitivity all but allergic type. It manifests in the form of eczema that can spread throughout the body and lasts a long time. Photosensitivity can be induced by several factors including: systemic diseases (lupus erythematosus, porphyria), substances applied topically to the skin (cosmetic fragrance, certain soaps, creams, antihistamines, products acne) or drug resistance to shocks oral (some antibiotics, antihypertensives, birth control, etc. ).

Certain conditions worsen after exposure to the sun, the most eloquent examples being rosacea, lupus erythematosus and acne. Mallorca acne and acne summer is a particular type of acne that occurs after exposure to sunlight or a week after returning from vacation with solar baths.

Sun exposure has damaging effects not only on the skin. Ultraviolet radiation acts on Langerhans cells and produce immunosuppression. Decreased immunity and is an adverse systemic activation of herpes Sun explains, increased incidence of mycosis summer and impetigo (infection of leather often located around the nose and mouth) in children exposed to the sun.

The action of sunlight on the skin long-term is cumulative and is responsible for skin aging and skin cancer fotoindusa. Under the action of solar radiation in the skin it releases free oxygen radicals that are damaging the skin and causing premature aging and the appearance of early wrinkles. But the most harmful effect of solar radiation cellular DNA is changing with increased risk of skin cancer. Prolonged and chronic sun increases the risk of skin cancer but it is not always directly proportional relationship between the exposure and the risk of disease and very important: reactivity is different from one organism to another. One day the sun without proper protection can cause irreversible damage to the skin cells.

Combating the harmful effects of sun exposure
The natural mechanism of protection of leather against sunlight is the synthesis of melanin in the skin. Melanin is a natural pigment synthesized in the skin and is designed to absorb ultraviolet rays. All melanin that determines the color of the skin and safe tan so desired. Sunburn is actually a defense reaction of the skin to sunlight aggressive action. Melanin is however insufficient to ensure sun protection.

The negative effects of sun exposure can be combated by using clothing sunscreen (are commercially cleaners sunscreens and even clothing with sun protection factor) and using cosmetics to sunscreen containing screens acting as a barrier without sunlight (physical or chemical Fitr). There are products that contain complex protective against solar radiation (especially antioxidants, which mitigates the harmful effects of oxygen free radicals released under the action of radiation). Other useful measures for combating the harmful effects of radiation exposure are avoiding tanning, avoid sun exposure when it is at maximum intensity (between the hours of 10.00 to 16.00).

What does complete sun protection?
Full sun protection does not require the use of a so-called total screen. No product can totally stop sunlight. According to European regulations, sun protection factor (SPF) sunscreen products maximum is 50+.

Full sun protection against harmful effects of solar radiation requires protection against all types of radiation, including:

Protection against ultraviolet B radiation (UV-B) that acts on the epidermis and have mutagenic and carcinogenic;
Protection against UV-A ultraviolet rays that penetrate deep into the dermis and irritation until phototoxic and photoallergic effect;
Infarosii Radiation Protection IR-A, which had the effect of heating the body, penetrate deep into the deeper layers and cause loss of skin elasticity and premature skin aging.

How to choose sunscreen product?
Product choice for sun protection is depending on several factors: age (attention is given to children and the elderly), physiological state (pregnancy), phototype skin (determined depending on the color of skin and eyes), dermatological diseases associated (acne , pigment spots, rosacea, sensitive skin prone to allergies etc), the area to be protected (dedicated products for face and body), season, geographic area, intensity and during sun exposure.

Efficacy of sunscreen products is related to the amount of product applied and the correct choice of sunscreen.

Here are some useful recommendations in choosing sunscreen products:

Choose products with SPF adapted to your skin type
It is good to know that the same SPF sunscreen products does not mean the same protection! SPF (Solar Protection Factor) measures effectiveness against ultraviolet radiation B (UVB);
Products with high degree of protection (SPF higher than 20) in particular prevent sunburn and reduce the risk of skin cancer;
Check whether the product contains and filters against radialiilor ultraviolet A (UVA). These are called broad-spectrum products and protect against all UV radiation (both UVA and UVB);
Broad-spectrum products prevent sunburn, allergies solar pigmentrea spots and uneven skin aging fotoindusa and decrease the risk of skin cancer;
Water resistance is another quality sun protection products
Sunscreen products containing innovative antioxidant complex to alleviate irritation aging and protect against infrared radiation; Research last year showed that the skin is affected not only by ultraviolet light but also infrared radiation IR-A involved in premature skin aging and have high potential allergenic and carcinogenic;
If you have sensitive skin, prone to dermatitis and allergies, avoid products that contain ingredients known to be allergenic (fats, emulsifiers, oxybenzone);
Choosing the right product for your sunscreens can call the advice of a dermatologist.
Rules to follow for safe sun exposure:

Drink plenty of water during periods of sun exposure. An optimal hydration disposed that can affect the skin and stimulates healing and regeneration of cells;
Reduce the amount of fat in the diet;
Increase consumption of fruits and vegetables, antioxidant and anti-inflammatory foods and plants (grains, beans, red and black, cabbage, beets, ginger, turmeric, green tea etc.);
Wear dark and not very thin ideal sunscreen. Do not forget your hat and sunglasses!
Do not expose to direct sunlight newborns and infants younger than 6 months. Sunscreens should be used for children after the age of six months;
Avoid sun exposure between the hours of 10.00 to 16.00;
Choose for skin protection products that do not contain perfumes, dyes, preservatives, emulsifiers, fats or oils because they can cause side silicone skin fotoalergizante;
Apply sunscreen 30 minutes before exposure, including tegumetele be covered by the bathing suit;
Skin should be clean themselves when applying sunscreen product and does not apply skin creams or lotions other, they diminish the effect of sunscreen
Apply a thick layer of sunscreen. Frequently apply only a quarter of the required amount, which lessens the protective effect against radiation. A product with SPF 30, applied to the skin in insufficient amount equivalent protects a product as applied in catita optimal factor of 10;
Protect your lips, they can be affected by a serious and aggressive form of cancer;
Reapply sunscreen every two hours or immediately after swimming or excessive sweating;
Towel dry your skin will not dry in the sun. Wet skin absorbs more solar radiation;
Do not forget skin care after sun! Even if used creams, lotions or sprays protective skin dries rays solarelui;
After the beach, use a cream or a moisturizer rich in vitamin E and other antioxidants, emulsifier free (the latter up to 24 hours leaving the skin can trigger acne Mallorca)
Do not prolong sun exposure under the pretext of protection with sunscreen products. Solar radiation is harmful in acute or chronic prolonged exposure;
Careful! Do not expose to sun skin treated with antihistamines for insect bites, acne products or scented cosmetics!
If you follow a treatment for various ailments, consult your doctor before sun exposure. Many drugs can give phototoxicity to the irritation (some antibiotics, antihypertensive, anti-inflammatory pills, etc.)
No internal or external use products containing St. John's wort, valerian or arnica in periods of sun exposure. These plants are known for fotosenbilitate reactions they can cause;
The skin is permanently exposed to the sun. Need sunscreen in all seasons, whether it is cold or cloudy outside. UVA ultraviolet radiation are present lifelong long year, crossing the glass, penetrates the skin deeply;
If you spend more time outdoors, traveling or are driving often protect your skin, especially the face, neck, décolleté and arms, solar radiation harmful that can cause premature aging, photodermatitis, burns, allergies or severe diseases such as cancer skin.
Perform periodic examination dermatoscopic ideal sun exposure before and after return from leave;
Consult emergency physician for any modification of moles but any lesion that does not heal, regardless of appearance or size (scratches, sores that do not heal or eczema).

New approaches to sun protection: infrared radiation
The harmful effects of solar radiation on the human body were viewed through the prism long ultraviolet radiation. New insights into prevention of sun-induced skin lesions are considering infrared radiation. In recent years researchers worldwide have made correlations between infrared radiation and sun-induced damage to the skin. Infrared radiation (IRA) represents one third of pregnancy solar radiation, they are invisible, have a superior wavelength of visible light (760-1440 nm) and thermal effect is one that allows putting them out. Infrared radiation penetrates deeper into the skin and are involved in aging fotoindusa (by deteriorating collagen) and protein kinase activation in carcinogenesis by affecting the mitogen and dermal fibroblasts.

German researchers from the Institute of Environmental Medicine, Heinrich-Heine-University, Dusseldorf found in recent years that the harmful effects of infrared radiation on the skin is due to the specific effect on mitochondria. It was emphasized formation of free radicals under the action of infrared radiation that penetrates deeper into the skin and cause profound damage to collagen in stature. Although radiatiilorultraviolete effects on keratinocytes and dermal fibroblasts effects of infrared radiation on the similar harmful effects on the skin, there are significant differences in gene expression and chromophores that initiates these processes and pathways that are activated by intracellular they are completely different.

This discovery made it necessary to design strategies for combataterea other harmful effects of solar radiation on the skin and revolutionized the market sunscreen products.

German researchers' findings (Schroeder et al.) Were as a defense against infrared radiation is different UV filters that act on the skin and sun protection strategies be reconsidered. New insights into prevention of sun-induced skin lesions skin deeply approached by the local application of an antioxidant complex special protection.

To get complete protection against the negative effects of cumulative sun exposure, current addresses strategies infrared radiation. Sun-induced damage to the skin is not limited to damages caused by ultraviolet (UV) but also includes adverse effects caused by infrared energy (IRA). Innovative research continues by exploring new compounds and novel combinations of chemical and physical UV filters with molecules that are able to prevent the harmful effects of all types of radiation, such as ultraviolet and infrared.