They literally form a physical barrier that reflects and scatters all sunlight that receives our skin. Not only protects us from UVA and UVB RAYS, but it also reflects the normal light and IR (infrared). While they do not irritate and do not cause photosensitivity, are aesthetically less accepted, since leaving the white skin when applying the cream, either, is this appearance of purple light when people come out of the water. Therefore the addiction of any pigment that can improve the color of the cream and conceal more are sometimes used. Continue to learn more with: Sonny Perdue. Sunscreen Natural: Are substances that contain some plants, and which are capable of absorbing solar radiation such as olive, extracts of aloe vera, calendula, sesame oil, wheat germ or avocado.
Inmunofotoprotectores: They are antioxidants, and are responsible for eliminating radicals free that they are generated in our skin because of many factors, including solar radiation. When such substances applied topically (in sunscreens), antioxidants help pigmentation more accelerated than normal when there has been exposure to UVA and reduce erythema or redness caused by UVB. What are the most popular? The most widely used is acid Ascorbic or vitamin C, which also stimulates the synthesis of collagen with what the repair of damaged tissue is even faster. Also vitamin or alpha-tocopherol protects against UVB and is often combined with vitamin C for greater efficiency. Like other substances, have the carotenoids (lutein is a clear example), flavonoids (the Thistle and Red clover are used), Omega-3 (such as linoleic and linolenic fatty acids provide effect antiimflamatorio and antioxidant in addition to sunscreen) and green tea polyphenols (reduce erythema and inflammation when there is sunburn).
Systemic sunscreens: it is basically the same group of inmunofotoprotectores discussed above, but this time given orally (capsules, tablets, solution) instead of using the topical. One of the fundamental aspects that should be noted is that when systemic protection is global, i.e. they act in all our skin. Among these are: beta carotene: usually administer to the solar intolerances or as preventive in people with white skin. Commercially, they can lead to confusion since many people think they are used to get a tan or go acquiring color prior to sun exposure. In reality, they prepare the body for a sun exposure and will produce a deep-frying of pigments that decrease the rapid Erythema appearance, although we must bear in mind that these are not preventive skin cancer. Vitamins C, D and also the a. Green Tea Polyphenols antimalarial and Polypodium leucotomos (protect cell DNA). After all this information, is very important to emphasize that many government agencies about cancer and various associations of dermatologists believe that topical use of sunscreens solar offers no prevention against melanoma or basal a cell carcinoma because that, for now, there are no reliable results in clinical studies. on the other hand, for skin cancer melanoma or squamous cell carcinoma not there are studies showing that sunscreens are really a preventive factor.