Applying sunscreen is the most common way to protect the skin from the sun’s radiation, but not everyone uses the most suitable product and not everyone remembers to re-apply it after a few hours. For some time now, more convenient alternatives for avoiding UV damage have been investigated. Oral photoprotectors could be one solution.
These products are sold as a method to protect the skin of the entire body evenly and uniformly, with no need to worry about sweat or contact with clothes or water, as happens with sunscreens. Oral sunscreens essentially contain antioxidants (carotenoids, polyphenols, flavonoids, etc.) and vitamins (C, E) that restore damage to DNA caused by UV rays. So far, however, they have not been shown to provide sufficient protection to be able to replace sun creams and, even less, to replace coverup clothing, sunhats and sunglasses. Read More
It may take a few hours for you to realise that you got sunburned while sunbathing. Similarly, the mutations that ultraviolet (UV) radiation can cause in DNA and that lead to the dreaded skin cancer continue for several hours after you’ve left the beach or the mountains and the sun has gone down.
Researchers at Yale University – led by Douglas E. Brash, a professor of radiology and dermatology – have published a study in Science that demonstrates that melanin, the pigment that darkens the skin to protect it from harm inflicted by UV rays, also has its downside. Certain components of this pigment are involved in the onset of DNA lesions that can cause the mutations responsible for melanoma – which continue for up to four hours after sun exposure has ended. Read More
Humans, without being aware of it, have an internal biological clock that controls many of their bodily functions. The skin also has these circadian rhythms and organizes its activities according to the hours of the day and the night to be more effective. This way we can know when is the optimum moment to apply a cosmetic product on the skin.
A healthily functioning human body relies on internal biological rhythms and patterns. These circadian rhythms are controlled by an "internal clock", located in the brain, that modulates the metabolism of organs and tissues 24 hours a day. The science that studies these processes is called chronobiology. Scientific studies have demonstrated how our skin cells are governed by circadian rhythms that directly affect cell regeneration in the epidermis. Read More
When we refer to the sun and to tanning, we refer to melanin. Melanin is produced when the sun touches the skin, making us go brown. This pigment darkens the skin to protect it from the damage caused by ultraviolet (UV) rays. Our hair and the iris of the eye also contain melanin. But what exactly is melanin and what is it for?
Melanin is not unique to humans, but is to be found in most living things. Thanks to melanin, some animals can change their colour as camouflage and plants have different colours. The melanin pigment is derived from tyrosine, an amino acid essential for our body to function properly. Melanin is made in the melanocytes (epidermal cells) and also in the hair follicles. It’s a bit like a coloured crayon, responsible for brownish and reddish tones in the skin and hair. But its main function is, in fact, to protect us against the damaging effects of UV radiation. Read More