My DH said that with a low creatinine like you have he personally, would have the BUN repeated. He also said to stress to you that if they are saying you are insulin resistant, etc. that he would go to an endrocronologist and see what they have to say. This is nothing against general practicioners...there are some really good ones but get the opinion of someone that deals with this type of thing daily. The last numbers on the BUN/CREAT is just the ratio. Most of the time both BUN and CREAT will go up together...there are some things that they won't though. Again, one point above normal is nothing to go crazy about but do have it repeated and see what it says.