Many of us see the ultraviolet (UV) index on weather reports and read about UV alerts at particular times of the day. But do you know what it actually means and how it affects you?
There are two main types of UV rays and both cause damage to skin cells. Ultraviolet light is a form of radiation invisible to the human eye. Ultraviolet wavelengths of sunlight are made up of UVB, which has shorter wavelengths and higher energy, and UVA, which has longer wavelengths and lower energy.
Both UVA and UVB cause damage to skin cells and contribute to skin cancer, melanoma, premature skin ageing, wrinkles and sun spots.
UVB is predominantly responsible for sunburn and UVA contributes to ageing as it penetrates deeper into the skin layers due to its longer wavelengths.
The World Health Organisation (WHO) recommends protecting the skin from the sun when the Ultraviolet Radiation Index (UVI) is 3 or higher. According to the WHO, "the UVI is a measure of the level of UV radiation. The values of the index range from zero upward. The higher the UVI, the grater the potential damage to the skin and eye and the less time it takes to occur."
Our Founder Johanna Young (right) had the pleasure to meet and discuss this subject with Dr Emilie Van Deventer (left), who is the leading expert at the WHO of the Radiation Programme. Dr Van Deventer says "Only recently has tanning become a fashion requiring preventive messages to explain the obvious, that it is dangerous to burn your skin and that sun protection is paramount."
The "index" part of the UVI refers to a table which was created over 20 years ago. This table was to be used in European countries and across North America.
Below is a summary of the UVI chart provided by the WHO.
For non-science enthusiasts, the most important thing to remember is that both the UVA and the UVB are harmful and can contribute to skin cancer, melanoma, premature skin ageing, wrinkles and sun spots.
It is also important to remember that even on cloudy days, the UV levels can be extreme. Research shows that up to 80% of UV radiation penetrates clouds.
Failure to use UPF50+ sun protective clothing, a sun hat and SPF50+ sunscreen will increase exposure to harmful UV rays.
At SOLBARI, we encourage all individuals to lead a healthy outdoors lifestyle, but remind them that it is essential to protect your skin and check it regularly.
The SOLBARI Team
This Blog is for information purpose only.
Moles primarily form when your skin cells are damaged from exposure to sunlight. Which is why people with fair skin tend who are most susceptible to sunburn are likely to have more moles.
The vast majority of common moles are harmless or benign, but they can in some cases develop into a malignant or melanoma skin cancer.