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Lactate Dehydrogenase (Blood)
This test looks at how much of the enzyme LDH you have in your blood. Higher levels of this substance could mean you've had a heart attack or other tissue damage.
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Lactose Tolerance (Blood)
This test tells whether your body is able to break down lactose, a sugar found in milk and other dairy products. If you can't digest lactose, you have lactose intolerance.
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Lactose Tolerance Hydrogen (Breath)
This test measures the amount of hydrogen gas in your breath. It can help find out if you are unable to digest milk and other dairy products.
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Lead (Blood)
This test measures the amount of lead in your child's blood. High levels of lead in the blood can be toxic.
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Adult Lead (Blood)
This test measures the levels of lead in your blood. You may be exposed to lead on your job or through lead-based paint used in your home.
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Lipoprotein-Associated Phospholipase A2
This test looks for a specific lipoprotein, Lp-PLA2, in your blood. The test is used to help predict your risk for cardiovascular disease and stroke.
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Lithium
This test measures and checks the amount of lithium in your blood. Lithium is a medicine used to treat certain psychiatric illnesses.
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Liver-Kidney Microsomal Antibody
This test looks for a certain type of antibody in your child’s blood. Having this antibody may mean that your child has liver damage caused by a form of hepatitis.
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Lecithin-Sphingomyelin Ratio (Amniotic Fluid)
This test measures two substances found in amniotic fluid near the end of pregnancy. The amounts can tell your doctor how mature your unborn baby's lungs are.
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