It is not enough to protect sun-exposed skin with a sunscreen and believing that you are doing the right thing though:( Not all sunscreens protect fully from harmful UVA-rays (320-400nm)!
The best are the ones that have min SPF30 and contain either the photo stable Mexoryl XS+XL (patented filters by L`Oreal, protection up to 387nm, partially up to 400nm) or Tinosorb M+S (protection up to 378nm, partially 395nm). None of these combinations are available in the US though
We have of course the good old particle filters like TiO2 and ZnO which can give just the right UVA protection if they are formulated correctly. It is a must that TiO2 (if micronized -protection up to 360nm-, particle size >100) is combined with ZnO. Min, content of active ingredients should be 20%! Under this the UVA protection wont be adequate. If ZnO used alone (not nano form which is prohibited in EU, allowed in the US and AU, particle size >35, protection 360nm)than the concentration should be between 20-25% (protection up to 520 nm, hence the white residue
. The general rule is that particle filters should leave a white-cast on the skin to be fully able to protect against the Sun`s harmful UVA rays (protection over 400nm!)--------------------
Multivitz — 2015-01-31 02:02:33 UTC
NO, L-Cystine is an amino acid that stops the skin burning. Get low in that and you burn easy. Check out my posts. Omega 3 is good but you need a total mix of stuff to get it all working. Hope this helps.