What did the endo say about your A1C being so low? Did the endo recommend the fructosamine test like Meg suggested. 5.7 is diagnostic for pre diabetes according to the American diabetes association, but CDA has not adopted this standard. I am not sure about how it usually works with splitting the lantus dose. If you split the original dose 50/50 or something else. You might want to post a thread about this. There are a lot of people here who are quite savvy with insulin algorithm (as general guidelines.) Think Like a Pancreas and Using Insulin are also supposed to be great books It seems like levemir is the more logical choice if you need two shots of basal a day. For one it does not burn (although a shot of 2-4 units will burn much less than a larger dose). Secondly levemir is shown to be weight neutral and there is a stronger correlation with weight gain with lantus.