I am looking for some advice on my son who has rheumatoid arthritis. He Is currently on a cocktail of medication including methotrexate. I persuaded him to get his b12 levels checked, they came back at 299 I believe between 200 to 990 ? My questions are, would he benifit from injections? He has all the symptoms of deficiency, although rheumatoid arthritis has also the same symptons ? Would injection also be beneficial to help future nerve and joint repair? Think what I am trying to ask would it be beneficial for him to injectin anyway? Thanking you all in advance. He is Already taking folic acid.