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 TSH Level. The normal thyroid level for TSH for labs in UK is 0.5 to 5.5 mIU/L (milli-international units per liter). Labs in the U.S. followed the same reference scale until 2003. In spring 2003, the scale was revised to new standards, which specified 0.3 to 3.3 mIU/L as normal TSH level.gain, for determining the level of T4, two types of tests are to be conducted. Normal thyroid levels for 'Total T4' are between 4.5 to 12.5 pg/ml. While, normal levels for 'Free T4' are within the range of 0.7 to 2.0 pg/ml.