61 H & PC Today -HouseholdandPersonalCareToday- vol.13(1)January/February2018 HOW ARE WE EXPOSED TO BLUE LIGHT? Blue Light is naturally present in the sun light reaching the earth surface, but is also emitted through various electronic devices containing LED bulbs. In fact, the white light from most LED sources is a combination of the shorter, highly energetic, blue wavelength and the yellow luminophores and the use of LED electronic devices has expanded exponentially in recent years. IMPACT OF BLUE LIGHT ON THE SKIN Artificial Blue Light is mainly a concern for the eyes since it is present in smartphones, laptops, tablets and LED screen televisions. It has been shown that Blue Light may have a serious detrimental impact on the internal eye structures leading to macular degeneration. Among the sources emitting Blue Light, the sun turns out to be the one having the most detrimental effect on the skin. However, even if the contribution of electronic Blue Light to cutaneous degradation is very small, digital pollution is more and more accused due to the rapid rise in technology and digitalization. Our 24/7 connected lifestyles may possibly increase the possibility of artificial light affecting the skin, but this has not been scientifically proven yet. It has been recently shown that Blue Light from the sun affects the molecular structure of the skin and various studies have shown that Blue Light induces significant oxidative stress which leads to lipid oxidation. The oxidative stress is induced by cumulative exposure to high doses of Blue Light on exposed skin structures such as the face and the hands. Keratinocytes are very sensitive to Blue Light. In the presence of Blue Light, the keratinocytes produce superoxides anions (O2•�), which are responsible for the alteration of the skin characteristics. The defensive action of the skin to such stress results in the production of enzymes known as Superoxide Dismutase (SOD) which neutralizes the superoxides ions and transforms them in less harmful products. However, as we grow older, the rate of production of SOD gradually decreases and we are more and more sensitive to Blue Light and its negative impact on the skin. BENEFICIAL EFFECTS OF BLUE LIGHT It is important to also quote the beneficial effects of Blue Light which is often used as a treatment for patients suffering from sleeping disorders. Indeed, Blue Light helps to reset the circadian rhythm, the internal body clock, which tells the body when to sleep, rise, eat and regulates many physiological processes. Blue Light is also frequently used to treat new born babies suffering from Jaundice. In the dermatological field, Blue Light is often used to treat disorders such as acne vulgaris. Blue Light is known to have broad spectrum microbial activity against gram-positive and gram-negative bacteria, hence acting on P.acnes , which is implicated in the development of acne. GETTING THE RIGHT BALANCE As we have seen, Blue Light, just as the UV Light, do have both beneficial and detrimental impact on the skin and what is important is to have the right balance between skin exposure and skin protection. People should not be exposing themselves to excessive dose of Blue Light but on the other hand, we should neither be avoiding it completely. BEHIND THE CLAIM COLUMN LEGAL SECTION A digital column authored by Mrs. Michela Velardo , Resident Counsel in Brussels at Cintioli & Associati. Advocate, member of the Brussels and Rome Bar Associations. Read the latest updates at www.teknoscienze.com/hpc-today/hpc-today-legal-section/