There are a number of misconceptions about the interaction between sunlight and skin. In this two part post we look at what we think are the top five most common sun and skin myths.
Myth 1: I can’t get sunburnt on a cloudy day (more…)
Top five sun and skin myths (part 1)
Thursday, February 2nd, 2012Photoaging
Thursday, December 22nd, 2011
Young adults are the age group most likely to seek a tan, with research showing that people under the age of 29 – particularly women – are tanning most frequently, both in the sun and under solariums. Aside from the well-recognised risks of skin cancer, there is another consequence of this increased exposure to ultraviolet (UV) radiation of which many teens are not aware – photoaging. In short, all this UV exposure over time makes skin look older. (more…)
Sun protection: Appearance is a greater incentive than health for young people
Monday, November 21st, 2011
According to the U.S. Preventative Services Task Force (USPSTF), the best way to deter teens and young adults from overexposure to the sun is to demonstrate the effects ultraviolet (UV) radiation can have on their appearance.
The USPSTF, an independent panel of experts assigned to provide recommendations on an array of health prevention issues, looked at evidence indicating behavioural counselling could help to prevent skin cancer. The newly released recommendations, an update of the 2003 statement, suggest that teens’ behaviour can indeed be changed through counselling; particularly that which highlights the physical changes UV radiation causes to skin, such as premature aging and wrinkling. (more…)
Ultraviolet A more cancer-causing than once thought
Tuesday, October 18th, 2011
While the evidence linking sunbeds to the development of skin cancer continues to mount, recent research provides new insight into the underlying mechanisms.
Radiation from both the sun and tanning beds is made up of various wavelengths, including visible light and several types of ultraviolet (UV) radiation. Ultraviolet B (UVB) rays, those which cause sunburn, have long been heralded the culprit which initiates skin cancer. It does this by damaging the genetic information (DNA) within skin cells, forming lesions known as cyclobutane pyrimidine dimers (CPDs) and pyrimidine (6-4) pyrimidone photoproducts (6-4PPs). These lesions create mutations in the DNA which can lead to the development of skin cancer (you can read about this process here). (more…)
Ultraviolet radiation and its effects on the skin
Wednesday, June 22nd, 2011
Ultraviolet (UV) radiation forms part of the electromagnetic spectrum between visible light and X-rays; it is invisible to the human eye. UV light can be separated into three bands, UVA (400-320nm), UVB (320-290nm) and UVC (290-100nm). Of the UV radiation that reaches the Earth’s surface from the sun, approximately 6% is UVB and 94% UVA.
Skin maintains a curious balance with UV radiation. When UV impacts upon skin, the various wavelengths of light penetrate to different levels and thus have a number of effects.
Cellular messaging leading to melanin production
Tuesday, June 7th, 2011Each cell within the body has one or more receptors; molecules on or within the cell to which other molecules, called ligands, bind. This binding causes a series of chemical reactions within the cell, called a ‘signaling pathway’. Signaling pathways are responsible for cellular responses, allowing other cells and external elements to alter how a cell functions. There are two types of ligands which bind to receptors: agonists, which then promote a response in the pathway, and antagonists, which lead to an alternate response. (more…)
“Solariums make a mockery of our efforts to reduce skin cancer”: Cancer Council Australia
Monday, May 16th, 2011
Cancer Council Australia has launched one of the strongest public attacks to date on the use and regulation of sunbeds in the country. This follows a report that some solarium devices emit UV radiation six times stronger than the sun at midday in Australia.
In a press release issued today, the CEO of Cancer Council Australia, Professor Ian Olver, cited a paper published in this month’s Photochemistry and Photobiology journal when calling for the Australian Government to phase out solariums. (more…)
Dear 16-year-old Me
Thursday, May 5th, 2011A great new viral video from the David Cornfield Melanoma Fund went live earlier this week. Check it out:
Head to the DCMF website for more on their work. You can read more about melanoma on our website.
Tanning beds and the vitamin D debate
Thursday, April 21st, 2011In a blog post last week we highlighted the mechanisms by which a tanning bed (solarium) can cause skin cancer, following new statistics on melanoma from the UK. Yet, individuals continue to use solariums – despite their risks – and much debate is ongoing about their exact impact upon human health, particularly with regards to vitamin D.
One of the key arguments made by advocates of solariums is that exposure to ultraviolet (UV) radiation is essential for the production of vitamin D. Tanning beds are, in theory, a good source of this nutrient during the winter months or in locations which don’t receive much sunlight throughout the year. Yet, to consider this reasoning, it is first important to understand the science behind these concepts. (more…)
Porphyrias: a disease grouping by cause, not symptoms
Monday, April 18th, 2011
Held biennially, the Porphyrins & Porphyrias conference (P&P) is the world’s largest gathering on the porphyrias – a group of metabolic disorders causing biochemical disruptions in the pathway of the body which synthesizes haem (heme).
As a result of each of these disruptions, the body presents with unique symptoms ranging from skin symptoms and phototoxicity – as those seen in erythropoietic protoporphyria and congenital erythropoietic porphyria – through to acute attacks of abdominal pain, seen most commonly in acute intermittent porphyria. In short, no two porphyrias are clinically identical yet they are discussed as a single group of disorders with a similar cause. As a matter of fact, there are eight variations of porphyrias, each with a specific clinical manifestation of disease. (more…)
