Biomarkers: explore one system at a time

Showing 921–940 of 1204 results

• Phytanic Acid Measures phytanic acid, a branched-chain fatty acid from the diet, used to look for rare disorders in which the body cannot break it down.
• Pigeon Feathers (e215) IgE Measures IgE antibodies to pigeon feathers, an animal allergen, to check whether you are sensitized to proteins from pigeons and their feathers.
• Pineapple (f210) IgE Measures IgE antibodies to pineapple, a food allergen, to check whether your immune system is sensitized to this tropical fruit.
• Pineapple (f210) IgG4 Measures IgG4 antibodies to pineapple, which reflect your immune system's exposure to this fruit; their link to food symptoms is debated.
• Pine Nut (f253) IgE Measures IgE antibodies to pine nuts, a seed food allergen, to check whether your immune system is sensitized to them.
• Pine (t213) IgE Measures IgE antibodies to pine tree pollen, an airborne allergen, to check whether you are sensitized to this tree.
• Pistachio (f203) IgE Measures IgE antibodies to pistachio, a tree nut allergen, to check whether your immune system is sensitized to this nut.
• Placental Isoenzymes Measures the placental form of alkaline phosphatase, which normally rises in pregnancy and is reported as part of an alkaline phosphatase isoenzyme test.
• Plasma Renin Activity, LC/MS/MS Measures plasma renin activity, an enzyme that controls blood pressure and salt balance, mainly used with aldosterone to look for causes of high blood pressure.
• Plasminogen Measures the activity of plasminogen, the protein that becomes plasmin to break down blood clots, used when assessing clotting and bleeding risk.
• Platelet Count Cell fragments that help your blood clot. Counted to screen for bleeding or clotting risk and various blood disorders.
• Plum (f255) IgE Measures IgE antibodies to plum, a stone-fruit food allergen, to check whether your immune system is sensitized to this fruit.
• PMS2 Genetic test of the PMS2 gene, which helps repair DNA copying errors; harmful variants are one cause of Lynch syndrome and raised cancer risk.
• Polyunsaturated, Total The combined level of polyunsaturated fatty acids, including omega-3 and omega-6 fats, in your blood, calculated from the individual fatty acids measured.
• Poppy Seed (f224) IgE Measures IgE antibodies to poppy seed, a seed food allergen, to check whether your immune system is sensitized to it.
• Pork (f26) IgE Measures IgE antibodies to pork, a meat allergen, often tested alongside alpha-gal to look into delayed reactions after eating red meat.
• Potassium An essential electrolyte that plays a critical role in heart rhythm, muscle function, and nerve signaling.
• Potassium, 24-Hour Measures the total potassium your kidneys excrete in urine over 24 hours, helping explain abnormal blood potassium and assess kidney handling of it.
• Potassium/Creatinine Ratio A ratio calculated from urine potassium and urine creatinine, used to judge potassium excretion while adjusting for how concentrated the urine is.
• Potassium, Random Measures potassium in a single random urine sample, giving a snapshot of how much potassium your kidneys are excreting.