I suffer from arthritis (especially in the hands) and for years I have been taking Glucosomine daily to try and ease the pain but, with little relief. A friend recommended I try Magnesium instead. Whilst on holiday I bought own brand Magnesium Oxide capsules from a branch of (beginning with R). I have been taking one 500mg capsule of Magnesium oxide each morning after breakfast for about 5 months without any side effects. After 1 month the pain and swelling decreased dramatically and now I have little or no pain in the joints.