Application of the creatinine correction is a technique to reduce excessive variation in urine test results due to differences in fluid intake prior to collection of urine samples. Dividing the amount of a substance in urine by creatinine corrects for cases in which the patient may be dehydrated or excessively hydrated. In the case of dehydration, failure to perform creatinine correction might indicate that the person has toxic levels of mycotoxins when, in fact, the values are high just due to dehydration. With creatinine correction, such an error is avoided.