Biomarkers: explore one system at a time

Showing 461–480 of 1204 results

• F5 Phenotype A summary of your predicted Factor V status based on your F5 gene result, showing whether you carry the Factor V Leiden variant linked to clotting risk.
• Factor II Activity Measures the activity of Factor II (prothrombin), a clotting protein made in the liver. Used to evaluate bleeding or clotting disorders.
• Factor II (F2) DNA Analysis A genetic test for the prothrombin (Factor II) G20210A variant, an inherited change in the F2 gene that can raise the tendency to form blood clots.
• Factor V Activity Measures the activity of Factor V, a protein needed for normal blood clotting. Used to investigate bleeding disorders.
• Factor V (F5), DNA Analysis A genetic test for the Factor V Leiden variant in the F5 gene, an inherited change that can increase the tendency to form blood clots.
• Factor V Leiden Mutation Analysis A genetic test for the Factor V Leiden mutation, one of the most common inherited causes of increased blood clot risk.
• False Ragweed (w4) IgE
• Fasting Glucose Blood sugar measured after fasting, one of the primary tests used to screen for prediabetes and diabetes.
• Fatty Acids, Total The total amount of fatty acids measured in your serum, used as the reference point for interpreting the individual fatty acids in the panel.
• Fc Epsilon Receptor (RI + RII) Antibody Looks for autoantibodies against IgE receptors on immune cells, which can trigger histamine release and help explain some cases of chronic hives.
• Fecal Fat, Qualitative A stool test that checks for excess fat under the microscope, used to look for signs that fat is not being properly digested or absorbed.
• Ferret Epithelium (e217) IgE Measures IgE antibodies to ferret skin and dander to check for allergic sensitization in people exposed to pet ferrets.
• Fibrinogen Activity, Clauss A protein your liver makes that's essential for blood clot formation. Also rises with inflammation, and low levels can indicate a bleeding disorder.
• Fibrinogen Antigen Measures the actual amount of fibrinogen protein present, as opposed to its clotting activity — used together with functional fibrinogen testing to evaluate clotting disorders.
• Fig (Ficus carica) (f328) IgE Measures IgE antibodies to fig fruit to check for allergic sensitization that may explain reactions after eating fresh or dried figs.
• Finch Feathers (re214) IgE Measures IgE antibodies to finch feather proteins to check for allergic sensitization in people who keep or are exposed to finches.
• Fire Ant (i70) IgE Measures IgE antibodies to fire ant venom to check for allergic sensitization in people who have reacted to fire ant stings.
• Firebush (w17) IgE Measures IgE antibodies to firebush (Kochia) weed pollen to check for allergic sensitization linked to late-summer and fall hay fever.
• Flaxseed (f333) IgE Measures IgE antibodies to flaxseed (linseed) to check for allergic sensitization that may explain reactions to foods or products containing flax.
• Flounder (f147) IgG4 Measures IgG4 antibodies to flounder, a marker of dietary exposure to this fish whose link to food-related symptoms is debated.