Hello,
I haven't followed this whole discussion, but another consideration for sun protection is to take natural fatty acids. Evening Primrose Oil, Flax Oil, etc. etc. I've heard can increase sun tolerance and perhaps even help with a tanning process. I have sensitive/light/vulnerable skin and this has helped me some, along with vitamin E.
I do believe not all sunscreens are created equal, and you need to look for ones that have the 'good' ingredients in them.
J
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