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A protein carried by certain cholesterol-carrying particles; its amount reflects their total number.

The amount of Lp(a), a cholesterol-carrying particle whose concentration is largely inherited.

Percentage of hemoglobin with sugar attached, reflecting average blood sugar over roughly two to three months.

A pancreatic hormone that helps move sugar from blood into cells and regulates energy storage.

A waste product from purine breakdown, assessed in gout and kidney-related testing.

An adrenal hormone involved in stress response, metabolism, blood pressure and inflammation.

All testosterone circulating in blood, including protein-bound and unbound forms.

Total testosterone — LC-MS/MS

The portion of testosterone circulating without being attached to blood proteins.

The main estrogen during the reproductive years, produced primarily by the ovaries.

A pituitary hormone that supports development of eggs in the ovaries and production of sperm.

A pituitary hormone involved in ovulation and sex-hormone production in the ovaries and testes.

An adrenal hormone the body uses to make testosterone and estrogen.

A protein made mainly by the liver that carries testosterone, estradiol and other sex hormones in blood.

A hormone produced after ovulation and during pregnancy, measured at a particular point in time.

A pituitary hormone that signals the thyroid gland to produce thyroid hormones.

The unbound portion of T4 thyroid hormone available to tissues, commonly considered alongside TSH.

An amino-acid intermediate affected by B vitamins, genetics, kidney function and other factors.

The main circulating form of vitamin D, reflecting vitamin D from sunlight, food and supplements.

A vitamin needed for red blood cell formation, nervous-system function and DNA production.

Vitamin B9, needed for making DNA, cell division and red blood cell production.

Iron circulating in blood at collection, mostly attached to the transport protein transferrin.

Estimated capacity of the blood's transferrin protein to bind and carry iron.

An iron-storage protein whose blood level generally reflects the body's iron stores.

A mineral involved in muscle and nerve function, heart rhythm and many enzyme reactions.

Amount of inorganic phosphate circulating in blood, rather than dietary intake or total body phosphorus.

A liver-made protein that rises in response to inflammation, measured with conventional or high-sensitivity assays.

The activity of lipase enzyme in a blood sample, distinct from stool-based pancreatic tests.

Amount of prostate-specific antigen used in prostate assessment; it does not diagnose cancer by itself.

The amount of PSA circulating unbound in blood, distinct from percent-free PSA.

Men: Conditional. Reflex testing when the laboratory criteria are met.