If it produces too much thyroid hormone, the bodyâs metabolism goes too fast, a condition which is called hyperthyroidism. If it produces too little, the reverse happens, and this condition is called hypothyroidism. Interestingly, both hyperthyroidism and hypothyroidism can cause fatigue.f it produces too much thyroid hormone, the bodyâs metabolism goes too fast, a condition which is called hyperthyroidism. If it produces too little, the reverse happens, and this condition is called hypothyroidism. Interestingly, both hyperthyroidism and hypothyroidism can cause fatigue.
Blood urea nitrogen (BUN) measures the amount of urea nitrogen in bloodstream. Urea is formed in liver as the end product of protein metabolism and digestion. Urea is transported to the kidneys for excretion. A normal range for blood urea nitrogen is generally 8 to 24 mg/dl for adult males and 6 to 21 mg/dl for females.Generally, a high blood urea nitrogen level means that the kidneys are not performing well, particularly if the result is above 50mg/dl.ormal range of serum creatinine level will differ with age, gender and physical constitute. In adult men, normal range of serum creatinine is 0.9-1.3mg/dl; while in adult women, normal range of creatinine is 0.6 to 1.1mg/dl.
Clinicians frequently calculate a convenient relationship, the urea nitrogen/creatinine ratio: serum bun in mg/dL/serum creatinine in mg/dL. For a normal individual on a normal diet, the reference interval for the ratio ranges between 12 and 20, with most individuals being between 12 and 16.