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Diabetes is a condition in which the body can't make enough insulin, or can't use insulin normally. Type 1 diabetes is an autoimmune disorder. The body's immune system damages the cells in the pancreas that make insulin. Insulin is a hormone. It helps sugar (glucose) in the blood get into cells of the body to be used as fuel. When glucose can’t enter the cells, it builds up in the blood. This is called high blood sugar (hyperglycemia).

Addison disease is when the adrenal glands don't make enough of two steroid hormones. The hormones are cortisol and aldosterone. Cortisol controls the body's metabolism, blocks inflammatory reactions, and affects the immune system. Aldosterone manages sodium and potassium levels. Addison disease is fairly rare and may first appear at any age.

This test measures the level of prostate-specific antigen (PSA) in your blood. If your PSA levels start to rise, you may have prostate cancer.

This test measures the amount of a substance called methymalonic acid (MMA) in your blood. Higher levels may mean you have a vitamin B-12 deficiency.

This test measures the amount of a substance called methylmalonic acid in your urine. It can help diagnose a vitamin B-12 deficiency.

This test looks for microorganisms in a sample of secretions from your genital area. Mycoplasma may be a sign of infection or a sexually transmitted infection.

This test measures a substance in your blood called pancreatic polypeptide. Higher levels may mean you have a type of pancreatic tumor.

This test measures the level of luteinizing hormone in your blood. It can help figure out the cause of infertility or diagnose a pituitary disorder.

These tests measure the amount of iron in your blood and how well that iron moves through your body.