 by Todd from Ontario Canada on June 20, 2009
what are the dangers of using sunsreens with bug repelants?
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by bob from china on February 22, 2009
my names bob and i have no friends except for sunblock
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by Delilah from Malaysia on December 6, 2008
So...which one is the best? Sunscreen or sunblock?
I live in Asia and i have medium dark skin but with fair undertone. I don't burn easily but i get darker.
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by keerthi from unknow on October 4, 2008
Sunblock vs. Sunscreen
Sunblocks (physical sunscreens) are opaque formulations which absorb, reflect and scatter up to 99% of both UV and visible light. Because they are messy and may stain clothing, sunblocks are often used on such sun-sensitive areas as the nose, lips, ears and shoulders. Examples of ingredients in sunblocks are zinc oxide and titanium dioxide.
Sunscreens (chemical sunscreens) absorb specific wavelengths (range of 200-400 nm) and are classified as drugs by the FDA because they are "...intended to protect the structure and function of the human integument against actinic damage." Sunscreens are considered more cosmetically refined due to their pleasing consistency and are, therefore, typically used over a prolonged time for effective photoprotection.
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