Testosterone is most commonly associated with sex drive, and is crucial for sperm production. It can also impact bone and muscle mass.

Free testosterone can bind to any cell in the body and helps regulate metabolism, and execute a variety of other cellular functions.

PSA is a serine protease whose function is to liquify semen to allow the release of spermatozoa. In healthy males, PSA is present in the bloodstream at very low concentrations (< 1 ng/mL).

In early reproductive years, estradiol is the main controller that develops and maintains female sex characteristics during puberty.

SHBG is a glycoprotein produced in the liver and binds to male sex hormones such as estradiol. SHBG controls the amount of testosterone that your body tissues can use.

After being released into the bloodstream by the pituitary gland, TSH then stimulates the thyroid to release the thyroid hormones T3 and T4. T3 and T4 help to regulate the amount of energy that is used in the body.

Your lipid profile measures the key fats and cholesterol particles in your blood, all produced, processed, or cleared by the liver. Imbalances are among the earliest and most common signs of fatty liver disease.

Creatinine is a chemical waste product of creatine and is used to supply energy. Serum creatinine levels indicate how well the kidneys are performing their function of filtering toxins from the blood.

Hematocrit measures the percentage of your blood volume that is made up of red blood cells. Red blood cells are produced in the bone marrow and carry oxygen from your lungs to the rest of your body.

Hemoglobin is a protein found in red blood cells. It gives blood its red color, and its job is to carry oxygen from your lungs to the rest of your body and return carbon dioxide back to your lungs to be exhaled.