Find the right blood test for you.

Measures prolactin, the pituitary hormone that stimulates milk production. Raised levels can affect periods, fertility and sex drive in both women and men. View details →

Measures total PSA, a protein made by the prostate. If the result falls in a borderline range, free PSA is added automatically to give further information. View details →

Measures intact parathyroid hormone, which regulates calcium in blood and bone. Usually interpreted alongside a calcium result, which this test does not include. View details →

Measures phosphorylated tau217 in plasma, a protein associated with Alzheimer's disease changes in the brain. A blood test used within specialist assessment of cognitive symptoms. View details →

Measures copper inside red blood cells rather than in serum. Reflects longer-term copper status, since serum copper is affected by inflammation and estrogen. View details →

Measures rheumatoid factor, an antibody found in rheumatoid arthritis and some other conditions. Less specific than anti-CCP, so results are interpreted together. View details →

Screens for syphilis by detecting antibodies produced during infection. A reactive result requires confirmatory testing, and the level is used to monitor treatment. View details →

Measures how quickly red blood cells settle in a tube, which increases with inflammation. A long-established general marker, slower to change than CRP. View details →

Measures selenium, a trace mineral needed for thyroid hormone processing and antioxidant enzymes. Can help assess both deficiency and excessive supplementation. View details →

Measures SHBG, the protein that binds testosterone and estradiol in the blood. Affects how much hormone is actually available to tissues. View details →

Measures the concentration of sirolimus, also called rapamycin, in the blood. Used to monitor people already taking the medication, because the range where it works well is narrow. View details →

Measures cholesterol carried by small, dense LDL particles. These are more strongly associated with artery disease than larger LDL particles at the same cholesterol level. View details →