well let's start at the beginning. i'll include some links to more information. the bun (blood urea nitrogen) test basically is used to give an idea of how well your kidneys are working. a "normal" bun range for adults is around 6-20 mg/dl. the fact your bun is 21 isn't necessarily reason for concern. many factors (including various medications) can affect the bun result and 21 might even be normal for you. it's hard to say without some past lab results to compare with. serum creatinine ranges in adult men run from about 0. 6-1. 2 mg/dl and for women the range is around 0. 4-1. 0. so it sounds like your creatinine level is within normal limits. a normal bun:creatinine ratio is considered to be 10:1-20:1. your bun/creatinine ratio is slightly elevated but probably no cause for alarm. however your best bet is always to consult a health care provider to discuss these results. what's normal for one person may not be normal for another. that's why we health professionals recommend you get blood work done every year. by comparing past results with current ones we can get a better idea of whether you have a problem developing that needs treatment. since i have no background information on you specifically it's impossible to say if these results deserve further investigation. if you're at all concerned about them you should visit your primary care provider. best wishes to you! no
a free blood screening = bun of 21; my creatinine serum was 0. 93; and my bun/creatinine ratio was 23. do i call dr.?