We can also find the same lack of magnesium in RA as in the other associated diseases. Here is a study that shows RA patients lack magnesium. http://www.ncbi.nlm.nih.gov/pubmed/8782128 We have posted a study previously that shows homocysteine is dysregulated in RA. In the conclusion it stated, " Elevated homocysteine levels occur commonly in patients with RA..." The first study also shows a lack of zinc in RA. Here are some of the foods zinc in found in. http://www.livestrong.com/article/233086-which-foods-contain-zinc/ The natural sources for are meat, fish and high levels in oysters. B12 is found more abundantly in oysters than in almost any other food.