Testosterone is a steroid hormone produced by the male testes and the adrenal glands in both men and women. This hormone production is stimulated and controlled by the luteinizing hormone. Testosterone is seen in large amounts in boys during puberty, causing growth of body hair and muscle development. It also regulates the male sex drive and maintain muscle mass. It is found in small amount in females from the ovary. Testosterone test is used to diagnosed various conditions such as erectile dysfunction and infertility in men.

Free Testosterone Calculation is a measurement of the amount of free testosterone in the body. It is a steroid hormone produced by the male testes and the adrenal glands in both men and women. It regulates the male sex drive and maintains muscle mass. Free testosterone calculation is used in the diagnosis of various conditions such as erectile dysfunction and infertility in men.

Sex Hormone Binding Globulin (SHBG) is a protein produced by the liver. Its main function is to bind and transport the hormones oestradiol, testosterone and dihydrotestosterone in the blood. The SHBG test is used to diagnose testosterone deficiency in men.

Albumin is a protein produced in the liver. It has many functions such as transporting hormones, vitamins and medications throughout the body. Albumin tests can be used to help diagnose and monitor diseases of the liver and kidney.