Came across another interesting article in the May edition of ‘The Archives of Dermatology’ 2011. The article is entitled ‘Lack of UV-A Protection In Daily Moisturising Creams’ on page 618.
Ultraviolet radiation (UV) contains UVA, UVB and UVC subtypes. The major source of UV exposure for humans is sunlight. The earths ozone layer blocks approximately 98% of all UV radiation and the 2% which reaches the earths surface 99% is of the UVA subtype. UVB can cause direct DNA damage whereas UVA causes indirect damage of DNA via the formation of free radicals. Therefore it is important any sunscreen solution contains both UVA and UVB filters.
This article reported the estimated long-range UVA1 protection of 29 creams.
Major points of note from the article include
– most daily facial creams contain ingredients known as UV filters claiming broad spectrum UV protection
– Sun protection factor (SPF) doesn’t reflect UV-A1 protection
– UVA penetrates window glass whereas UVB is blocked, therefore women working indoors need to protect themselves from UVA exposure
– of the 29 creams 6 didn’t contain any UVA1 filters
I recommend reading the full article as it is an interesting read. Below is a link to the article.
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