Is the Sun a source broadcasts permanently UV for these rays also has many advantages in return damage remains the question whether the benefits of sun exposure outweighs the damage or vice versa and what are the means of prevention for the benefit of human and not prejudiced? Benefits of sunlight: · Scientific studies have shown that sunlight is necessary for vitamin d excretion from the body. This vitamin is responsible for the strength and integrity of bones – and vitamin d deficiency leads to rickets disease in children as in adults, vitamin d deficiency leads to osteoporosis, or are they causing recurrent fractures. · Recent studies have revealed that vitamin d plays a protective role in protection against heart disease and clots of blood pressure and found that exposure to sunlight and vitamin d reduce the rate of deaths from heart disease. · Vitamin d reduces incidence of some cancers such as breast, colon and prostate. · Extends the benefits of sunlight to include mental health, help to relax and rest and it is necessary to improve the quality of human life and preventing depression and schizophrenia by secreting alandrovine. · Sun helps in the treatment of some diseases such as psoriasis that affects about 2% of Europeans may also help in treating tuberculosis. · Sun contributes to formation of pigment melatonin necessary to the health and safety of the skin. · Prevent appropriate doses of sunlight immune system disorders – may also help alleviate chronic pain. How to produce vitamin d from sunlight in healthy ways: Vary the amount of vitamin d that results from sunlight from one person to another but generally light-skinned people produce more vitamin d when exposed to sunlight. Just 15 minutes of exposure to sunlight on the face, arms and legs without using sunscreen to produce 1500-3000 unit vitamin d from cholesterol. This quantity is sufficient for a period of one to three days. In General, exposure to the Sun for 10-15 minutes several times a week is safe and does not cause damage to the skin and sufficient to provide healthy amounts of vitamin d for our bodies. Important production of vitamin d through sunlight by taking it from other sources such as fish oil, for example, that the production of vitamin d through sunlight can in no way up to excessive rates or where there is a balance of the skin and vitamin d are cracking too much. Sun damage: That UV rays cause damage many also helped erode the ozone layer a newly leaked massive amounts of UV than the us in the early 1970s to about 7-14%. The influence of UV radiation on the skin are the most common and the strongest, but also affect the eye. They generally cause damage as follows: · Increase the proportion of wrinkles and sagging skin with yellow staining or almrhashfh dark skin may look Sun lovers in the mid-1950s as a person in the 75th. · Cause dilation of small blood vessels under the skin surface. · Increase the growth and thickness of the skin alaktini Garni. · Causes the opacity in the lens of the eye and sometimes cancer in the cornea. · Undermine the immune system and cause skin cancer, studies have revealed that the effect of sunlight on the immune to direct skin exposure to sunlight for a short period not exceeding one hour summer days may inhibit the immune system over 15 days. Types of skin cancer: There are three types of skin cancer – basal carcinoma squamous walkarsinoma walmilanoma. Basal and squamous carcinoma represents about 95% of skin cancer and the proportion of their recovery high yet, according to the latest World Health Organization statistics estimate the number of deaths from skin cancer in about 60,000 cases a year. 1. basal carcinoma: produce 50-90% of cases of constant exposure to the Sun and appear in the form of a Daisy on the face or neck or ear – or red spots or pink in the trunk and legs. 2. squamous carcinoma: produce 50-70% of cases of constant exposure to the Sun and looks in a red tumor or harshvat rough may cause itching and bleeding is usually in the Center. 3. melanoma: more cancers are dangerous and are most common in the United States and about 38,000 a year, half of them under the age of 50 and women are more vulnerable to infection than men – is the most common cancer in women aged 25-30 years. And the second most common type of breast cancer after age 30-35. Estimated number of deaths from melanoma in the United States by about 7000 per year. Melanoma arises from exposure to sunburn usually before the age of 18 and know the burn that redness in the skin for 12 hours. Some attribute the Melanoma to repeated exposure to x-rays. Look melanoma-shaped dark spots herringbone can heal nearly 90% of cases of Melanoma if detected early through surgical removal, but if llanbethath becomes healing and metastasis is more common in men, especially if the spots in the chest or abdomen or back. How UV causes cancer? There are two types of UV rays. UV (a) cause wrinkles and discolouration of the skin loses its flexibility, but its ability to skin cancer is limited. UV (b): cause sunburn and cancer. The UV (b) kill millions of t cells in the blood vessels near the skin-it secretes immune system antibodies directed to the