• Josep Orellana, science journalist

    The skin’s circadian rhythms

    26 May The skin’s circadian rhythms

     

    Sources:

    Journal of Biological Rhythms

    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

  • Fede Montagud, editor

    Cosmetic surgery: think twice…

    21 May Cosmetic surgery: think twice...

     

    Sources:

    The Guardian

    Cosmetic or plastic surgery is no trivial matter. And not just because a person may become unrecognizable or lose something of their character, as has recently happened with celebrities. Misinformation and the tendency to make light of cosmetic surgery lead us to overlook the fact that it is still surgery, with all the associated risks. An Australian initiative recommends a mandatory cooling-off period of at least a week.

     

    The Medical Board of Australia, which regulates medical practice in this country, wishes to remedy the current situation with its publication of a guide that recommends a cooling-off period before any operation. The aim is for the patient to consider all aspects of their decision to undergo a surgical procedure for purely cosmetic reasons. Caution is crucial, especially in light of complaints and cases of malpractice by unqualified personnel operating in ill-equipped clinics. Read More

  • Núria Estapé, science journalist

    What’s melanin for?

    16 May  What’s melanin for?

     

    Sources:

    Photochemistry and Photobiology

    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

  • Anna Solana, science journalist

    Cannabis: a beauty product?

    11 May Cannabis: a beauty product?

     

    Sources:

    The Huffington Post

    Elite Daily

    There is no lack of studies that certify its benefits for the skin. But nowadays, with studies on almost everything, that’s no guarantee of anything. Even so, the beauty industry, especially in the USA, seems to have found a new “natural” seam to mine and are proclaiming the benefits of cannabis for beautiful skin.

     

    Google returns hundreds of thousands of hits for topical, more or less homemade and alternative use of cannabis to relieve itching and treat eczema, acne and other skin problems such as atopic dermatitis. So, nothing new in that; as the Huffington Post points out, the oil obtained from hemp seeds has long been used in shampoos and conditioners. This oil is rich in omega-3 and omega-6 and has mere traces of cannabinoid THC (tetrahydrocannabinol). It is, in fact, a good emollient that soothes, softens and moisturizes the skin. Read More

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