11/11/2023 0 Comments Oil sunscreen for faceTheir penetrating and carrying properties, as well as their natural content of tocopherols, carotenoids and essential fatty acids, make them highly valuable. Many liquid oils extracted from fruit and vegetable seeds are light, low in viscosity and less occlusive than hydrocarbon oils. The use of skin care products supplemented with several effective agents working through different pathways in conjunction with the use of sunscreens may be an effective approach for reducing UV-B-generated ROS-mediated photo-aging. ![]() Sunscreens and sun blocks are chemicals that absorb or block UV rays and show a variety of immunosuppressive effects of sunlight. Currently UV-B radiation and to a lesser extent UV-A radiation are responsible for inducing skin cancer. UV-C is the most biologically damaging radiation, but it is filtered out by ozone layer. Solar ultra violet radiations (UVR) is divided into three categories: UV-C (200-280 nm), UV-B (280-320 nm) and UV-A (320-400 nm). Volatile oils are used as perfumes in cosmetics. Oily vehicles are more effective for producing a uniform and long-lasting film of sunscreen on the skin, and their emollient properties protect the skin against the drying effects of exposure to wind and sun. The study will be helpful in the selection of oils and fragrances to develop sunscreens with better safety and high SPF. ![]() Similarly among essential oils, SPF value of peppermint oil was found to be the highest. Among the fixed oils taken, SPF value of olive oil was found to be the highest. It can be observed that the SPF values found for nonvolatile oils were in between 2 and 8 and for volatile oils, in between 1 and 7. Hydroalcoholic dilutions of oils were prepared, and in vitro photoprotective activity was studied by UV spectrophotometric method in the range of 290-320 nm. The in vitro SPF is determined according to the spectrophotometric method of Mansur et al. Sun protection factor is a laboratory measure of the effectiveness of sunscreen the higher the SPF, the more protection a sunscreen offers against the ultraviolet radiations causing sunburn. The aim of this study was to evaluate ultraviolet (UV) absorption ability of volatile and nonvolatile herbal oils used in sunscreens or cosmetics and express the same in terms of sun protection factor (SPF) values.
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