However, how to lower BUN and creatinine level naturally? Both BUN and creatinine are metabolic waste products, and the healthy kidneys keep them range at a normal level. If kidneys canât play their job optimally, excess creatinine and blood urea nitrogen will build up in the body. Clinically, 5.0mg/dl of creatinine and 60mg/dl of BUN are two indicators of renal failure.
Your provider may also check your TSH level if you are planning to get pregnant. Normal values range from 0.4 to 4.0 milli-international units per liter (mIU/L). 1  TSH values can vary during the day. It is best to have the test early in the morning.  Experts do not fully agree on what the upper number should be. Opinions vary from 2.5 to 4.0 mIU/L.
Normal and Abnormal Test Results. Although various professional health bodies have specified the normal range for TSH to be 0.4 - 4.5 mIU/L in the past, new regulations recognize that this range is too wide. Currently, the standard reference range for TSH is 0.4 - 3.0 mIU/L. However, clinical data show that 95% of euthyroid patients fall in the range 0.4 - 2.5 mIU/L. In addition, adults with TSH levels over 2.0 mIU/L are likely to develop hypothyroidism later in life. Therefore, the ideal range of TSH is 0.4 - 2.0 mIU/L. Children, generally, have higher TSH levels than adult. The National Academy of Clinical Biochemistry recommends 1.3 - 19 mUI/L for newborns. These values drop with age and by the first year, TSH level for an infant should be between 0.4 mIU/L and 7 mIU/L.