Biomarkers: explore one system at a time

Showing 941–960 of 1204 results

• Potassium, RBC Measures potassium inside your red blood cells, as a look at potassium stored within cells, where most of the body's potassium is held.
• Potato (f35) IgE Measures IgE antibodies to potato, a food allergen, to check whether your immune system is sensitized to this vegetable.
• Potato (f35) IgG Measures IgG antibodies to potato, which reflect your immune system's exposure to this food; their link to food symptoms is debated.
• Pre-Albumin A protein made by the liver that reflects recent (days, not weeks) nutritional and protein status — useful for tracking short-term nutrition changes.
• Pregnenolone A hormone made from cholesterol that's the starting building block for all your other steroid hormones, including cortisol, DHEA, and sex hormones.
• Pristanic Acid Measures pristanic acid, a branched-chain fatty acid made from dietary phytanic acid, used to look for rare disorders of fat breakdown.
• Privet (t210) IgE Measures IgE antibodies to privet pollen, a shrub and tree allergen, to check whether you are sensitized to it.
• Procalcitonin Measures procalcitonin, a protein that rises sharply in bacterial infections, used to help assess serious infection and guide decisions about antibiotics.
• Procollagen Type I Intact N Terminal Propeptide Measures intact P1NP, a marker of new bone formation, used to help assess bone turnover and monitor response to osteoporosis treatment.
• Progesterone A hormone essential for the menstrual cycle and pregnancy. Used to confirm ovulation, evaluate fertility, and monitor early pregnancy.
• Prolactin A pituitary hormone best known for stimulating milk production; also checked to evaluate menstrual irregularities, fertility issues, or pituitary conditions in men and women.
• Promyelocytes The absolute number of promyelocytes, immature white blood cells normally found only in bone marrow, in your blood, reported as part of a differential.
• Promyelocytes (%) The percentage of your white blood cells that are promyelocytes, immature cells normally found only in bone marrow, reported as part of a differential.
• Prostate-Specific AntigenPSA A protein made by the prostate gland. Used to help screen for and monitor prostate cancer, though it can also rise with benign prostate conditions.
• Prostate-Specific Antigen (PSA), Free The unbound portion of prostate-specific antigen. Used alongside total PSA to help assess prostate cancer risk, especially when total PSA is borderline.
• Prostate-Specific Antigen (PSA), % Free The percentage of your PSA that's unbound to blood proteins. A lower percentage raises suspicion for prostate cancer, helping refine an elevated total PSA result.
• Prostatic Acid PhosphatasePAP An older prostate marker, largely replaced by PSA, occasionally still used in specific prostate cancer monitoring contexts.
• Protein A urinalysis screen for protein in your urine, used to look for signs that the kidneys may be leaking protein.
• Protein C Activity Measures the activity of Protein C, a natural anticoagulant. Low activity is linked to an increased risk of blood clots.
• Protein C Antigen Measures the actual amount of Protein C protein present, used together with the activity test to fully characterize a Protein C deficiency.