Sure, it is true that glucose levels can affect the results of a DUI blood test and cause them to falsely indicate intoxication. For example, medical experts have found that an elevated glucose level in the body can cause an overestimation of alcohol concentration in the analysis and consequently result in a false positive reading on a breathalyzer. However, even when high glucose levels are present in diabetes patients, the amount of inaccurate readings reported still remain relatively low compared to other factors, such as diet and health conditions. Therefore, any defense based on this should be heavily backed scientifically by both legal reasoning and medical expertise.