But there are certain foods that boost your own skin's sun protection. That is just fact. Probably not by much but it is true. I think one of the ingredients is lycopene - found in tomatoes, but most strongly tomato puree for some reason. More concentrated I suppose. But I doubt (as you say) the blogger is suggesting just rely on food.
Trust Caroline to focus on one small part of a reasoned and interesting debate and go off all guns blazing about the tiny bit she understands.
You can just imagine her roaming round the stately pile shouting about it and working herself up into a state