I have been trying a silica supplement, recommended for help with my very damaged knee. Its coming up for our winter here in Aus and my knee is usually really painful when the weather gets colder and wetter.
I have been taking 10ml per day of colloidial silica gel made by Qsilica: http://www.qsilica.com.au/,
the difference has been remarkable, no knee pain whatsoever, and my skin is clear of excema for the first time in my memory, I did have improvements with excema from Iodine supps, but there was always small outbreaks, with the silica supps I have been completely clear of all excema.