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Not all creams are created equal so choose carefully. SPF (sun protection factor) provides the simplest measure of how good a cream is in protecting against sunburn. The SPF rating only refers to how well the sun cream protects against UVB Rays, not UVA.
The British Association of Dermatologists recommends an SPF of 30 as a minimum.
The UVA protection is shown through a star system. On any sun cream packaging, you should see a UVA star rating from zero to five.
Now, this is where it gets a little tricky! The rating refers to the protection offered relative to how well it protects against UVB. So five-star UVA protection might not be all that great if the SPF is very low.
For adequate protection, aim for an SPF of 30 and a star rating of four or five to ensure protection from both UVA and UVB rays.
A great cream will not only help to prevent further damage but will also ensure that you get the most from any aesthetic treatment you may choose.