Shiseido Products

Sunscreen (also known as sunblock, suntan lotion) is a lotion, spray or other topical product that helps protect the skin against the sun’s ultraviolet (UV), and which reduces sunburn and other skin lesions in order reduce your risk of skin cancer. However, in the United States, the term suntan lotion usually means the opposite of sunscreen, and instead refers to lotion designed to moisturize and maximize UV exposure and tanning rather than block it. They are commonly called indoor tanning lotions when designed for use with tanning beds or just suntan lotion if designed for outdoor use and may or may not get an SPF in them. The most effective sunscreens protect against UVB rays (ultraviolet rays of wavelengths between 290 and 320 nanometers), which can cause sunburn and UVA (between 320 and 400 nanometers), which damages the skin effect longer term, such as premature skin aging. Most sunscreens work well containing an organic compound that absorbs ultraviolet light (such as oxybenzone) or an opaque material that reflects light (such as titanium dioxide, zinc oxide), or a combination of both. In general, absorption materials are called chemical building blocks, whereas opaque materials are mineral or physical blocks. Contrary to the common view that sunscreen should be reapplied every 2-3 hours, research has shown that the best protection is achieved by application 15-30 minutes before exposure, followed by a new application 15 – 30 minutes after sun exposure begins. more reapplication is necessary after activities such as swimming, sweating, and friction. Sun Protection Factor The SPF of a sunscreen is a laboratory measure of the effectiveness of sunscreen, the higher the SPF, the more protection a sunscreen offers UV-B (ultraviolet radiation that causes sunburn). The SPF indicates how long a person can be exposed to sunlight before getting sunburn with sunscreen applied with respect to when they can be exposed without sunscreen. For example, someone who would burn after 12 minutes the sun would expect to burn after 2 hours (120 minutes) if they are protected by a sunscreen with SPF 10. In practice, the protection of a particular sunscreen depends on factors such as: The user’s skin type. The requested amount and frequency of the new application. Activities of the person in question (for example, swimming leads to a loss of sunscreen the skin). The amount of sunscreen the skin has absorbed. The SPF is an imperfect measure of skin damage because invisible damage and skin aging is caused by the very common ultraviolet type A, which does not cause redness or pain. Conventional sunscreen does not block UVA as effectively as it does UVB, and SPF 30 + may translate into a significant reduction in protection against UVA rays, according to a 2003 study. According to a 2004 study, UVA also causes DNA damage to cells deep in the skin, increases the risk of malignant melanoma. Even some products labeled “broad-spectrum UVA / UVB” provides good protection against UVA rays. The best UVA protection is provided by products containing zinc oxide, avobenzone and Mexoryl. Due to consumer confusion about the scope and duration of protection offered, labeling restrictions in several countries. In the United States in 1999, the Food and Drug Administration (FDA) has decided to implement the labeling of SPF 30 + for sunscreens offering more protection and a similar restriction applies in Australia. This was to prevent companies from making unrealistic demands on the level of protection (such as “all day protection”), and because an SPF over 30 does not provide much better protection. The SPF can be measured by applying sunscreen to the skin of a volunteer and measure the time it takes before sunburn occurs when exposed to artificial light. In the U.S., this in vivo test is required by the FDA. in vitro also can be measured using a specially designed spectrometer. In this case, the effective transmission of the sunscreen is measured, with the deterioration of the product being exposed to the sun. Active Ingredients The following are the FDA allowable active ingredients in sunscreens: P-amino benzoic acid (PABA) up to 15%. Avobenzone up to 3%. Cinoxate to 3%. Dioxybenzone to 3%. Homosalate up to 15%. Menthyl anthranilate up to 5%. Octocrylene up to 10%. octyl methoxycinnamate (octinoxate) until 7. 5%. octyl salicylate up to 5%. Oxybenzone up to 6%. Padimate W to 8%. Phenylbenzimidazole sulfonic acid (Ensulizole) to 4%. Sulisobenzone up to 10%. Titanium dioxide up to 25%. trolamine salicylate up to 12%. Zinc oxide 25%. Mexoryl SX ® – UVA Absorber.