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.
How to Read the Results. For healthy adults, the normal TSH range is 0.4 - 4.0 milli-international units per liter of blood. This range jumps to 0.5 and 3.0 milli-international units per liter of blood for patients that are being treated for thyroid disorders. If our thyroid hormones are low, our bodies will attempt to balance out the hormones.